Hide in the (Network) Neighborhood in Windows PC

Don't want your XP computer to show up in the network browse list (Network Neighborhood/My Network Places) to other users on your network? One way to accomplish that is to disable file sharing. To do this, click Start, right click My Network Places and select Properties. Right click your local area connection and click Properties. Uncheck the box that says File and Printer Sharing for Microsoft Networks. Click OK.

But what if you want to be able to share folders with some users; you just don't want everyone on the network to see your computer's shares? There's a way:

Click Start and select Run.
In the Run box, type net config server /hidden:yes
Click OK.
Now others who know the UNC path (\\computer name\share name) can connect to your computer's shares from the Run box, but it won't show up in the network browse list. 

How to "Delete administrator Password" without any Software

Method 1
Boot up with DOS and delete the sam.exe and sam.log files fromWindows\system32\config in your hard drive. Now when you boot up in NT the password on your built-in administrator account which will be blank (i.e No password). This solution works only if your hard drive is FAT kind.

Method 2
Step 1. Put your hard disk of your computer in any other pc .
Step 2. Boot that computer and use your hard disk as a secondary hard disk (Don't boot as primary hard disk ).
Step 3. Then open that drive in which the victim’s window(or your window) is installed.
Step 4. Go to location windows->system32->config
Step 5. And delete SAM.exe and SAM.log
Step 6. Now remove hard disk and put in your computer.
Step 7. And boot your computer

All Keyboard Shortcuts (Must Read)

Getting used to using your keyboard exclusively and leaving your mouse behind will make you much more efficient at performing any task on any Windows system.

Windows key + R = Run menu

This is usually followed by:
cmd = Command Promptiexplore + “web address” = Internet Explorer

compmgmt.msc = Computer Management

dhcpmgmt.msc = DHCP Management

dnsmgmt.msc = DNS Management

services.msc = Services

eventvwr = Event Viewer

dsa.msc = Active Directory Users and Computers

dssite.msc = Active Directory Sites and Services

Dos Commands For System Managers

Networking

ipconfig – Windows IP Configuration

This has to the DOS command I use most today. ipconfig will tell you the IP settings for the current computer such as what your current IP is and what subnet/gateway you are on. It is great for troubleshooting. Here are the two most useful commands for ipconfig and usage:

ipconfig /release – This will release any IP information that the computer was given and make your IP address 0.0.0.0