• Make disk images, restore points, and backups of files and registry keys to repair your system if you fuck things up.
  • CDs: Restore access  
If you can't access CDs after removing CD burning software:

1) Open regedit and go to:
2) Delete the UpperFilters and LowerFilters values

  • Control Panel: Remove duplicate network connections entry  
1) Open regedit and go to HKEY_CURRENT_USER\Control Panel\don't load
2) Add a string called  ncpa.cpl and set to No

  • Defragment boot files  
The boot defragment option is usually enabled by default, but it may be disabled, or not properly enabled.
If it's not working, XP may boot dog-slow.

To enable it:
1) Open regedit and go to HKLM\Software\Microsoft\Dfrg\BootOptimizeFunction
2) If the string called Enable is set to N, change it to Y

  • Desktop: Remove task pane from desktop  
1) Open regedit and go to:
2) Set the default value to:
file://%userappdata%\Microsoft\Internet Explorer\Desktop.htt

Or run the script from

  • DLLs: Fix missing DLLs  
If XP complains about missing DLLs (may be accidentally deleted when you uninstalled a program), you can extract them from your XP install disk with the expand command.

Or you can download them from

  • Files: Repair file associations

  • Folders: Repair default action (stop launching the search box)  
1) Open regedit and go to HKCR\directory\shell
2 Set default value to none (yes, type none)

Folders still misbehaving? Merge the "repair folder association" reg file from into your registry.

  • Icons: Repair xp style icons  
1) Open regedit and go to HKCU\Control Panel\desktop\WindowMetrics
2) Set Shell Icon BPP to 16 and set Shell Icon Size to 32

  • .NET framework: repair, install, remove  
.NET removal tool:

  • Quick launch: Show desktop button in quicklaunch bar (or other places)  
Put the "Show Desktop" shortcut from
in Documents and Settings\{user name}\Application Data\Microsoft\Internet Explorer\Quick Launch

or in your start menu or wherever you want it

  • Power options: repair power schemes and the ability to save your own power settings  
The easy way:
Use the ready-made "repair power schemes" reg file from

The hard way:
1) Open regedit and export  HKU\.DEFAULT\Control Panel\PowerCfg to a .reg file
2) Open the .reg file and replace every instance of:
3) Merge the edited reg file back into your registry

More on

  • Safe mode  
You can repair lots of stuff in safe mode (hit F8 before windows starts).
Your firewall may not load by itself in safe mode, so pull modem/NIC plugs and start your firewall before plugging 'em back in.

  • TCP/IP: increase the half-open connection limit set by SP2  
Service Pack 2 limits the number of half-open connections to 10. A security measure that doesn't increase security at all.
The update causes problems with programs that need many connection attempts, such as file sharing programs and P2P TV apps.
To repair the damage caused by SP2, run the "SP2 connection limit patch" from

More on

  • Windows Update: Repair Windows Update  

Windows Update Repair Tool


  • Windows won't boot: HAL.DLL missing  
1) Boot from your XP CD
2) Hit 'R' (recovery console)
3) Run these commands:
  bootcfg /list
  bootcfg /rebuild


  • Windows won't boot: NTLDR not found  
1) Boot from your XP CD
2) Hit 'R' (recovery console)
3) Run the fixboot and fixmbr commands

If that doesn't fix the problem:

1) Boot from your XP CD
2) Hit 'R' (recovery console)
3) Run these commands (edit drive letters and paths according to your system setup):
  copy D:\i386\NTLDR C:\
  copy D:\i386\NTDETECT.COM C:\

If that still doesn't fix the problem:

  • Windows won't boot: NTOSKRNL not found  
1) Boot from your XP CD
2) Hit 'R' (recovery console)
3) Run these commands (edit drive letters and paths according to your system setup):
  cd D:\
  expand ntkrnlmp.ex_ C:\windows\system32\ntoskrnl.exe


  • Windows won't boot: All-in-one solution  
Repair XP and reset windows login passwords with the Emergency Boot CD:

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