Regedit, You may be thinking "Regedit, what the hell is that?!" or if you have a reasonable amount of experience with computers "Oh awesome a page about what this program is.

What is Regedit?

Regedit is basically a program that lets you edit ceratin values in your computer (short for "Registry Editor"). BEWARE, DON'T JUST PLAY AROUND IN REGEDIT, SOME THINGS CAN SERIOUSLY HARM YOUR COMPUTER IF CHANGED OR REMOVED. You can do really cool things with it such as remove buttons on your computer .e.g remove the shutdown option or make a message appear at startup.

Before you do anything you will need to know how to access the program.:
So first go to your start menu
Then click run
Now type "regedit" without the quotes
Regedit should open (if it doesnt contact me)

How to display a legal notice on startup
This is how to make a legal notice appear on startup:

Open Regedit

Navigate to "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system"

legalnoticecaption:"enter your notice caption here"

legalnoticetext:"enter your legal notice text here"


Add admin user to welcome screen:
Start the Registry Editor Go to:

HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ Winlogon \ SpecialAccounts \ UserList \

Right-click an empty space in the right pane and select New > DWORD Value Name the new value Administrator. Double-click this new value, and enter 1 as it's Value data. Close the registry editor and restart.



Kill Processes immediately:
When logging off, you sometimes get an “End Task” dialog prompt, indicating a program that doesn’t shut itself down. You can suppress the prompts and have Windows kill these programs automatically when you log off. In regedit, find key HKEY_CURRENT_USER\Control Panel\Desktop Look for the value AutoEndTasks, and change it from 0 to 1.



No Shutdown:
Wanna play with your friends by removing the shutdown option from start menu in their computer.
Regedit
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
"NoClose"="DWORD:1"


Show Superhidden Files:
Even if you turn on show hidden files in Windows Explorer some files will remain hidden. These files are super hidden. Set the registry value below to 1.


Unblock Regedit and CMD prompt:
Save this file is a .reg file then execute it

REGEDIT4
[HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesWinOldApp]
"Disabled"=dword:0
[HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesSystem]
"DisableRegistryTools"=dword:0


Memory Performance
Improving memory performance can be done simply by preventing your hard drive from being used for cache. This is only useful with 256Mb or more of RAM.
Everything that you'll need to edit here can be found in HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Session Manager/Memory Management
So of course add [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management] to your *.reg file.
Disable Paging Executive
This will prevent pages sections from RAM going to the hard drive. If you have a large amount of RAM at least 256Mb (I suggest 512) you might want to keep the data in your RAM to improve your performance considerably due to reduced amount of hard drive swappage. The entry that you will want to modify is called DisablePagingExecutive. Changing this from 0 to 1 will keep the data in your RAM.
"DisablePagingExecutive"=dword:00000001

System Cache Boost
The XP kernel can be loaded into your RAM with a simple registry edit. This can greatly improve performance since the NT Kernel will always be in your RAM. With this edit you will allocate roughly 4Mb of your RAM for the kernel. Sometimes more RAM is used but most of the time it is only 4Mb. The entry that you will need to find is called LargeSystemCache and you'll need to change this from 0 to 1 in order to enable this.
"LargeSystemCache"=dword:00000001
To put both of these RAM tweaks into use you'll add something like this to your reg file
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management]
"DisablePagingExecutive"=dword:00000001
"LargeSystemCache"=dword:00000001

The XP Prefetcher

Windows XP has a service called the Prefetcher. It basically monitors the different programs that start during startup and helps them launch faster.
To find this tool browse to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters
The important key is EnablePrefetcher. Default value for this is 3. You will want to try numbers between 1 and 6. 5 seems to work best for me but your mileage may vary.
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters]
"EnablePrefetcher"="5"