How To:
Your Password Is Not Retained in Windows 2000 or Windows XP
http://support.microsoft.com/?kbid=259416
Change XP Security
Open the New Folder. 
In the New Folder window, click the Tools menu and click the Folder Options command. 
Click on the View tab and scroll down to the bottom of the list of options. Remove the check mark from the Use Simple File Sharing (Recommended) option. Click Apply and then click OK.
How to Recover from a Corrupted Registry That Prevents Windows XP from Starting
md tmp
copy c:\windows\system32\config\system c:\windows\tmp\system.bak
copy c:\windows\system32\config\software c:\windows\tmp\software.bak
copy c:\windows\system32\config\sam c:\windows\tmp\sam.bak
copy c:\windows\system32\config\security c:\windows\tmp\security.bak
copy c:\windows\system32\config\default c:\windows\tmp\default.bak

delete c:\windows\system32\config\system
delete c:\windows\system32\config\software
delete c:\windows\system32\config\sam
delete c:\windows\system32\config\security
delete c:\windows\system32\config\default

copy c:\windows\repair\system c:\windows\system32\config\system
copy c:\windows\repair\software c:\windows\system32\config\software
copy c:\windows\repair\sam c:\windows\system32\config\sam
copy c:\windows\repair\security c:\windows\system32\config\security
copy c:\windows\repair\default c:\windows\system32\config\default
 
This article was previously published under Q307545
How to Clear the Page File at Shutdown
 
Bits and pieces of data lurk in all sorts of unlikely places, all over your computer. One place is in the page file, which is used by XP for swapping out data from physical memory to the hard disk when applications need more memory than you have installed (this is called virtual memory). You can set XP to clear the page file when you shut down, deleting this information, by performing the following:
 
1. In your favorite Registry Editor, navigate to:
HKEY LOCAL MACHINE\SYSTEM\CurrentControlSet\Control\SessionManager\MemoryManagement
 
2. In the right pane, double click the item labeled ClearPageFileAtShutdown
3. In the "Value data" text box, you'll see the default value of 0. Change it to 1
4. Close the Registry Editor
 
You'll need to reboot for the change to take effect. As always, take care when editing the Registry. 
How to Recover from WinSock2 corruption
 
1. In your favorite Registry Editor, navigate to:
HKEY LOCAL MACHINE\SYSTEM\CurrentControlSet\Control\Services\Winsock
HKEY LOCAL MACHINE\SYSTEM\CurrentControlSet\Control\Services\Winsock2
2. Right Click and delete both of these
3. Restart PC
4. Right Click Network Connnections and do Properties
5. Click Install, Click Protocal, then ADD
6. Click HAVE DISK, type in C:\Windows\inf then OK
7. Select INTERNET PROTOCAL (TCP/IP0 and then OK
8. Restart the computer
Error Number: 0x8DDD0004
 
Windows update won't work
1.  Start Internet Explorer
2.  In the Tools menu, select Manage Add-ons…
3.  Then locate the entry named "WuWebControl Class"
4.  If disable then select Enable
Remote Desktop Port
 
HKEY\Local_Machine\System\CurrentControlSet\Control\TerminalServer\Winstations\RDP-Tcp\PortNumber
1.  Click Modify
2.  Click Decimal
3.  Change the port number
Move Music
1. Click Start -> Run, and type in "regedit" (no quotes) and press enter on the keyboard.
2. RegEdit will appear. Navigate to HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Explorer \ Shell Folders.
3. Right click on the folders you want to change and select Modify.
4. Change the path of your folder to the new path (example: d:\my music).
5. Reboot your computer.
SvcHost 100%
1. At windows updates webpage, disable MSoft updates and let me use Windows updates alone, from left side index, properties or options, or something like that.
2. Rt click “My Computer”, and manage
3. Extend services and applications
4. Rt click auto updates and stop
5. Browse to %windir%\Software Distribution\DataStore and delete contents OR rename Software Distribution to .old or .bck
6. Restart windows updates in the services and applications
7. Do an MSoft update
8. See hot fix 927891 as well 
9. Use this link for more info:  http://ask-leo.com/svchost_and_svchostexe_crashs_cpu_maximization_viruses_exploits_and_more.html