Customize Logon Prompt with Your Own Words

Open Registry by going to Start then Run, entering regedit and Navigate to [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]. In right pane, look for key by the name "LogonPrompt". Set its value to whatever text you want to see displayed at login screen.

Making Google the Default Search Engine in IE

Open registry editor by going to Start then Run and entering regedit and navigate to following three keys separately and change it as shown below:

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]
"Search Page"=" http://www.google.com"
"Search Bar"=" http://www.google.com/ie"
[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchURL]
""=" http://www.google.com/keyword/%s"
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Search]
"SearchAssistant"=" http://www.google.com/ie" .

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'

Removing Shared Documents folder From My Computer

Open registry editor by going to Start then Run and entering regedit. Once in registry, navigate to key

HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Explorer \ My Computer \ NameSpace \ DelegateFolders

You must see a sub-key named {59031a47-3f72-44a7-89c5-5595fe6b30ee}. If you delete this key, you have effectively removed the my shared documents folder.

Locking the desktop

If you are leaving your computer for a while and do not wish to turn it off, but want to assure that no-one else can use the computer while you are away, locking the desktop is the best option.

By pressing WINDOWSKEY+L, you password protect your system just as if you had logged out or restarted the computer. The advantage is that any programs or processes that were running when you locked the desktop will stay open and running in the background, ready for you to resume work or play.

Renaming The Recycle Bin icon

To change the name of the Recycle Bin desktop icon, click Start then goto Run, write Regedit and press Enter. It opens Registry Editor. Now in Registry Editor go to:

HKEY_CLASSES_ROOT/CLSID/{645FF040-5081-101B-9F08-00AA002F954E}
and change the name "Recycle Bin" to whatever you want (don't type any quotes).

Modify autoplay for different types of CD

Windows XP includes the ability to perform different actions depending on the type of CD you insert into the drive. For example, you could set your system to always respond to CDs containing MP3 files by opening Windows Media Player.

To edit the Autoplay properties: Open 'my computer'. Right click on the drive you wish to set and select 'properties.' Choose the autoplay tab. Use the dropdown box to see the various recognized types of CD and choose appropriate actions for them.

Modify Autoplay for Different Types of CD

Windows XP includes the ability to perform different actions depending on the type of CD you insert into the drive. For example, you could set your system to always respond to CDs containing MP3 files by opening Windows Media Player.

To edit the Autoplay properties: Open 'my computer'. Right click on the drive you wish to set and select 'properties.' Choose the autoplay tab. Use the dropdown box to see the various recognized types of CD and choose appropriate actions for them.

Deleting System Softwares

Windows XP hides some system software you might want to remove, such as Windows Messenger, but you can tickle it and make it disgorge everything. Using Notepad or Edit, edit the text file /windows/inf/sysoc.inf, search for the word 'hide' and remove it. You can then go to the Add or Remove Programs in the Control Panel, select Add/Remove Windows Components and there will be your prey, exposed and vulnerable.

Creating a Desktop Shortcut for Locking Your Computer

If you use your computer in an area where others may have access to it, and there are things on your system you would rather have kept confidential, locking your desktop when you leave the computer is an essential task. Here's a recipe for a desktop shortcut that will lock your computer in two easy clicks:

Right click on an empty area of the desktop and choose 'new' then 'shortcut.' The create shortcut wizard will open; in the first text box, type '%windir%\System32\rundll32.exe user32.dll,LockWorkStation' and then give your shortcut an appropriate name on the next page, and hit 'finish.'

You will notice that the shortcut you created has a blank icon. To select a more appropriate one, right click on the shortcut and hit 'properties.' In the 'shortcut' tab, click the 'change icon' button.

In the 'look for icons in this file' box, type '%SystemRoot%\system32\SHELL32.dll' then click 'ok' to see a range of icons for your new shortcut. Choose an appropriate icon. Your desktop locking shortcut is now ready for use. Test it out.
It is usegul if u have an account as it will prompt 4 a password

Increasing Band-Width By 20%

Microsoft reserves 20% of your available bandwidth for their own purposes like Windows Updates and interrogating your PC etc

To get it back:

Click Start then Run and type "gpedit.msc" without quotes.This opens the group policy editor. Then go to:
Local Computer Policy then Computer Configuration then Administrative Templates then Network then QOS Packet Scheduler and then to Limit Reservable Bandwidth. Double click on Limit Reservable bandwidth. It will say it is not configured, but the truth is under the 'Explain' tab i.e."By default, the Packet Scheduler limits the system to 20 percent of the bandwidth of a connection, but you can use this setting to override the default."
So the trick is to ENABLE reservable bandwidth, then set it to ZERO. This will allow the system to reserve nothing, rather than the default 20%.It works on Win 2000 as well.