100. Force windows XP to reboot upon crashing

This registry edit will cause your system to reboot itself automatically upon crashing. This can be useful if you have a reason for keeping your system on 24/7:

Open REGEDIT

Navigate to 'HKEY_LOCAL_MACHINE\SYSTEM
\CurrentControlSet\Control\CrashControl'

Edit the 'AutoReboot' value to '1'

101. Disable admin shares

Windows XP creates a hidden share for every drive on your computer. C$, D$, etc. These shares are accessible only to user accounts with administrative privileges, meaning any account that you created during the installation of windows XP.

Essentially, this means that anyone with a valid username and password from your system can get access to anything on your drives remotely. While this is the number one reason why you should always use good passwords on your Windows user accounts, this feature can be disabled with a little registry tinkering.

To disable the hidden shares:

Go to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\lanmanserver\parameters

Add the Dword value 'AutoShareWks' with a value of '0'