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Friday, 20 November 2015

How to fixes windows 10 problems

There is no doubt that windows 10 is becoming most popular operating system by Microsoft because the response to Windows 10 has been overwhelmingly positive. The new features like improved Start Menu, Cortana,Microsoft edge, New media players, notification-bar, etc. makes it more user-friendly as well as a solution for a big disaster that was Windows 8.

Many people are still out there who do not like any new update of Windows. They say Windows XP and Windows7 were far better than any other release because people are getting a lot of errors and issues which are simply not acceptable by anyone. Though, Microsoft is releasing new updates whenever they encounter any error.

If you are upgrading to Windows 10 or if you have upgraded it, you may encounter some of these common problems we are mentioning below. We have also included how to fix these issues.

Common Windows 10 problems and fixes
1. Windows 10 asking for activation even it is a free upgrade
Many people are reporting that once they install free upgrade of windows 10, it asks for activation. It is not possible for an user to activate windows 10 because it ask for product/activation key and free upgrade do not provide any activation key. There’s really nothing an user can do to fix it but microsoft said this issue will usually resolves itself after a few minutes.

2. Windows 10 occupying 15-20 GB Extra space
After upgrading to windows 10, you would be seeing around 15-20 GB of space is missing. It is because Windows has given this alternative remembering the way that might want to restore the past version of windows OS. This isn’t a big probem if you’ve got TBs of HDD. For those with lower storages and SSDs, it’s trouble.

If you don’t want to go back to past version of windows OS, there is no need to keep this back up. You can format the drive and perform a clean install otherwise you can do this simply by following steps mentioned in this article Regain around 20 GB Space After Upgrading to Windows 10.

3. I can’t play my favorite games in windows 10
It is found that many gamers are having troubles related to thier favorite games. Some games can’t be installed, some games are installed but showing errors, games are opening but only blank screen is showing, mouse is not working while playing games in windows 10, keyboard is not working, etc.

The solution of this problem is:

1. Install latest graphic Drivers and Directx.
2. Run drivers in Compatibility mode.

Right click on the Setup file of the Driver and select Properties.
Select Compatibility Tab.
Place a check mark next to Run this program in Compatibility mode and select the operating system accordingly from the drop down list.
Click OK and run the setup.
3. Launch game in Compatibility Mode.

Right click on the Setup file of the Driver and select Properties.
Select Compatibility Tab.
Place a check mark next to Run this program in Compatibility mode.
4. Touchpad problems in windows 10
Many users are having issues with laptop’s trackpad since upgrading to Windows 10. To solve this problem, you can try

1. Uninstall and Reinstall driver

Open device manager and select Mice and other pointing devices.
Right click on uninstall driver .
In device manager menu click scan for hardware changes
Also check if there are any newer drivers available, or coming soon.
2. Adjusting Windows 10’s touchpad settings.

Open Start, type ‘touch’ and hit enter.
You can change the delay, and make further tweaks by clicking ‘Additional mouse options’.
5. Internet speed is getting slow in windows 10
It is always a headache when we don’t get the real internet speed provided by our Internet Service Provider. Many windows 10 users are reporting that thier internet speed is getting worse after upgrading to windows 10. This is true because windows 10 install so many updates automatically and so many background processes that can not be seen by a user. Microsoft keep collecting your data and use your internet bandwidth and speed. To overcome this problem you can Optimize Your Windows 10 against spying.

6. Screen flashing and flikering issue in Windows 10
After the update to Windows 10, some users experienced continuous flashing on their screens, they can’t open any program at that point of time.

Open Task Manager, click File > Run new task, type ‘msconfig’ without quotes and press enter
Click on ‘Services’ tab, find two services named ‘Problem Reports and Solution Control Panel ‘and ‘Windows Error Reporting Service‘ , uncheck them to disable, if Windows prompts you for a restart, do it.
7. Wi-Fi is slow in winodws 10 or not connecting
To slove the wi-fi problems you can try the following methods:

Turn off and on your router
Turn off and on your computer.
Check with your network adapter manufacturer and make sure that you have the latest driver. Download it on another computer and install it via USB flash drive.
Make sure that your router also has the latest firmware. You’ll find it at the manufacturer’s website.
Go to Settings > Network & Internet > Wi-Fi. Make sure that the Connect automatically box is checked for the network you want to connect to.
Go to Settings > Network & Internet > Wi-Fi > Manage Wi-Fi settings > Manage known networks and choose your network, then click Forget. Reboot the machine and enter the network details to connect fresh.
8. I am the admin but windows 10 asking for an administator account
Press Windows key + r to open run command.
Type netplwiz to open user accounts.
 In user accounts select user.
Under user just select the Microsoft account.
Click on remove.
Click on apply.
Click on ok.
Restart your computer and check.
9. How do i open Windows 10 in safe mode ?
Booting your Operating system in safe mode to solve many problem is good practice. Still, many people are facing problem how to boot windows 10 in safe mode. To do this you need to follwing these steps:

You will see Power icon on the lower right of the screen.
Click on it. You will see option to shutdown and restart
Press and hold Shift and then click on Restart
You will see Windows Recovery Environment, select Troubleshoot, then Advanced options, then Startup Settings, and Restart.
After a restart you will see options to boot windows 10 in safe mode.
10. I can’t fix any issue in windows 10
If your system encounters some serious issues after the Windows 10 upgrade, you may delete the OS and reinstall it without removing files. For this, perform the following:

Click Start button in the bottom left corner of the screen
Click Settings>> Update & Recovery
Click Recovery then Reset This PC
You can delete your files along with Windows 10, if you wish so. After deleting, Windows 10 will install automatically

Monday, 28 July 2014

How to make batch virus files

They can be used to delete the windows files,format data,steal information,irritate victim, consume CPU resources to affect performance,disable firewalls,open ports,modify or destroy registry and for many more purposes.

Now lets start with simple codes, Just copy the code to notepad and save it as anything.bat (here  anything means any name youwant to give to your file  but extension must be .bat and save it as 'all files' instead of text files).

Note: Type 'help' in command prompt to know about some basic.

 commands and to know about using a particular command , type 'command_name /?' without quotes

Friday, 11 July 2014

Knowledge Book Pages

Sunday, 24 November 2013

How to trobleshooting SafeBoot

McAfee ePolicy Orchestrator (ePO) Server •Operating systems ?Microsoft Server 2003 Service Pack 1 (SP1), 2003 R2 •Hardware requirements ?CPU: Pentium II-class 450 MHz or faster ?RAM: 512 MB (1 GB recommended) ?Disk space: 250 MB Desktop & Laptop Endpoints •Operating systems ?Microsoft Windows 8 ?Microsoft Windows 7 ?Microsoft Windows Vista ?Microsoft Windows XP Professional SP1 or higher ?Microsoft Windows 2000 SP4 or higher •Hardware requirements ?CPU: Pentium III 1 GHz or faster ?RAM: 512 MB (recommended) ?Disk space: 200 MB ?Network connection: TCP/IP for remote access Windows Mobile Endpoints •Operating systems ?Microsoft Windows Mobile 6.0 for Smartphone ?Microsoft Windows Mobile 6.0 for PDA ?Microsoft Windows Mobile 5.0 for Smartphone ?Microsoft Windows Mobile 5.0 for Pocket PC •Hardware requirements ?CPU: 195 MHz ?RAM: 64 MB ?Network connection: TCP/IP for remote administration and ActiveSync 4.5 or higher for wired policy installation/updates

Friday, 19 July 2013

What Is a TCP/IP Routing Table

 A routing table is used by TCP/IP network routers to calculate the destinations of messages it is responsible for forwarding. The table is a small in-memory database managed by the router's built-in hardware and software.
Routing Table Entries and Sizes

Routing tables contain a list of IP addresses. Each IP address identifies a remote router (or other network gateway) that the local router is configured to recognize. For each IP address, the routing table additionally stores a network mask and other data that specifies the destination IP address ranges that remote device will accept.

Home network routers utilize a very small routing table because they simply forward all outbound traffic to the Internet Service Provider (ISP) gateway which takes care of all other routing steps. Home router tables typically contain ten or fewer entries. By comparison, the largest routers at the core of the Internet backbone must maintain the full Internet routing table that exceeds 100,000 entries and growing as the Internet expands.

Two hypothetical, partial routing table entries are shown below:

    IP Address: - Network Mask:

    IP Address: - Network Mask:

In this example, the first entry represents the route to the ISP's primary DNS server. Requests made from the home network to any destination on the Internet will be sent to the IP address for forwarding. The second entry represents the route between any computers within the home network, where the home router has IP address
Dynamic vs. Static Routing

Home routers set up their routing tables automatically when connected to the ISP, a process called dynamic routing. They generate one routing table entry for each of the ISPs DNS servers (primary, secondary and tertiary if available) and one entry for routing among all the home computers. They may also generate a few additional routes for other special cases including multicast and broadcast routes.

Most residential network routers prevent you from manually overriding or changing the routing table. However, business routers typically allow network administrators to manually update or manipulate routing tables. This so-called static routing can be useful when optimizing for network performance and reliability.
Viewing the Contents of Routing Tables
On home broadband routers, the routing table contents are typically shown on a screen inside the administrative console.

On Windows and Unix/Linux computers, the netstat -r command also displays the contents of the routing table configured on the local computer

Thursday, 8 November 2012


Power ON -> Router 

ctrl + break

>confreg 0x2142

# show run
# show start
# copy start run          (Press Enter)
#show run

# conf t
(config)# no enable password
(config)# config-register  0x2102
(config)# exit
# copy run start          (Press Enter)
# reload

How to made easy Subnetting

Subnetting Made Easy
Hi all,

I've received an email from one of your members asking me to post up my technique for subnetting as links to external blogs are not allowed due to forum rules. I know that he benefited from it and he wishes to help out others so here goes:

First of all I need you to get rid of all of the negative thoughts surrounding subnetting. Put down all of the books that you have read about the subject and navigate away from other sites claiming to provide an easy way to subnet. This technique requires no charts, just simply the know-how to work with the powers of 2.

We need to start with the fundamentals of IP addressing. An IP address is made up of 32 bits, split into 4 octets (oct = 8, yes?). Some bits are reserved for identifying the network and the other bits are left to identify the host.

There are 3 main classes of IP address that we are concerned with.

Class A Range 0 - 127 in the first octet (0 and 127 are reserved)
Class B Range 128 - 191 in the first octet
Class C Range 192 - 223 in the first octet

Below shows you how, for each class, the address is split in terms of network (N) and host (H) portions.


At each dot I like to think that there is a boundary, therefore there are boundaries after bits 8, 16, 24, and 32. This is an important concept to remember.

We will now look at typical questions that you may see on subnetting. More often than not they ask what a host range is for a specific address or which subnet a certain address is located on. I shall run through examples of each, for each class of IP address.
IP addressing and Subnetting:
To fully understand Subnetting, it is vital to know how many network and host bits are present in Class A, Class B, and Class C networks.
  First Octet (Range) No. of Network Bits No. of Host Bits Default Mask
Class A 1 – 126 8 24
Class B 128 – 191 16 16
Class C 192 – 223 24 8

Network Address broken down into network and host bits.

Dotted decimal               17           1                             1                             1
Octet in binary 0001001 00000001             00000001             00000001
Network / Host Bits       Network Host                       Host                       Host

Subnetting is simply a process of “borrowing” host bits in order to create the subnet portion of an address. Note in the following examples that the network portion of the address never changes. The subnet field always borrows from the host bits.

Why Use Subnetting?
Subnetting is a highly effective method of conserving  IP address. Consider a point to point ISDN connection with two host addresses, one on each side of the connection. Using an entire Class C address range for this network segment would be a waste of addresses. A default Class C network mask of yields 254 usable host addresses, but only two are needed for this small network.

Subnetting allows the use of a “tighter” subnet mask that the default; that is, one that yields a smaller amount of network addresses. The benefit is that the address that would have been wasted are now still usable by other segments of the network.

Determining the number of valid subnets
To determine the number of valid subnets for a given number and mask, use this formula:
Number of subnets = (2 squared by the number of subnet bits) – 2
The number of subnet bits is determined by examining the default network mask for that class, and comparing it to the actual network mask. Taking network as an example, the default mask for the class B network is write out the default mask and the actual mask in binary:

                1st octet 2nd octet 3rd octet 4th octet
Default mask 1111111 1111111 0000000 0000000
Subnet mask 1111111 1111111 1111111 0000000
Type and number of bits all network bits all network bits all subnet bits all host bits

No. of subnet bits = network bits in (subnet mask) – network bits in (default subnet mask)
No. of hosts bits = 32 – no. of network bits in subnet mask (CIDR value)

x= no. of subnet bits    
y = no. of host bits
No. of valid subnet = 2x -2
No. of host per subnet = 2y – 2
Total no. of host = no. of valid subnet X no. of host per subnet
For example:
i)               (stated in prefix notation and /24 is called CIDR value)
x = 24 – 16 = 8                    
y= 32 – 24 = 8
No. of subnets = 28 – 2 = 254
No. of host per subnet= 28 – 2 = 254
x= 24 – 8 = 16
y= 32 – 24 = 8
No. of subnets = 28 – 2 = 254
No. of host per subnet = 28 – 2 = 254
x= 27 – 24 = 3
y= 32 – 27 = 5
No. of subnets = 23 – 2 = 6
No. of host per subnet = 25 – 2 = 30

Determining the subnet number (subnet address) of a given IP address and subnet mask
is accomplished by performing a Boolean AND operation.
First, the IP Address and its subnet mask will be converted to binary. The Boolean AND is simply a bit-by-bit comparison of the IP Address and the Subnet Mask.
1 + 1 = 1
0 + 1 = 0
0 + 0 = 0                                              
(if any value is 0 then result 0)

Consider Network Address Convert the IP address and the subnet mask into binary, remembering that /24 is equivalent to

                1st octet 2nd octet 3rd octet 4th octet
IP Address 10110010 00111000 00010101 00001001
Subnet mask 1111111 1111111 1111111 00000000
AND Result 10110010 00111000 00010101 00000000
AND Result (decimal) 172 56 21 0

So, Subnet Address of is

Example: What is the subnet address of
                1st octet 2nd octet 3rd octet 4th octet
IP Address 11001000 10011010 10010110 01011001
Subnet mask 1111111 1111111 1111111 11100000
AND Result 11001000 10011010 10010110 01000000
AND Result (decimal) 200 154 150 64

So, Subnet Address of is

Host Range in a given subnet
Y = 32 – 27 = 5

Total no of valid host in a given subnet = 2y-2 = 30

First IP Address (in the subnet)
(When all hosts bit are 0) Valid Host Range (in the subnet) Last IP Address (in the subnet)
(When all host bits are 1) to (next n/w 64+32)

Meeting Stated Design Requirements:
Your network uses Class B You need at least 150 subnets that have no more than 200 hosts apiece. What subnet mask should you use?

No. of subnet ≥ 150
2X – 2 ≥ 150                          (so x = 8)

No. of hosts per subnet ≤ to 200
2Y – 2 ≤ 200                          (so x = 7)

As is a Class B address with default mask 16 bits are being used for network and leaving another 16 bits to be divided between subnet and host bits.
As no. of Hosts per subnet should not be more than 200, and No. of subnet can be more than 150. We are not going to use more than 7 bits for the hosts, it means we have 9 bits for the subnet.
So x = 9

so the subnet mask you should use is or /25