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In case of user password boot the pc in safemode by pressing the F8 key and then selecting the Safe Mode option. You can now logon as an administrator and XP wont prompt for the password. Incase of an administrator account try rebooting the pc in DOS. access C:\Windows\system32\config\sam . Rename SAM as SAM.mj Now [...]

Open Notepad and paste the below code in it. [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters] "SackOpts"=dword:00000001 "TcpWindowSize"=dword:0005ae4c "Tcp1323Opts"=dword:00000003 "DefaultTTL"=dword:00000040 "EnablePMTUBHDetect"=dword:00000000 "EnablePMTUDiscovery"=dword:00000001 "GlobalMaxTcpWindowSize"=dword:0005ae4c Now save this file as speed.reg. Execute it and observe the change!

Defrag Secret – Hidden Command Line Switch Instructions – Go to –>Start –>Run -> and Type defrag c: -b to defragment the Boot and Application Prefetch information. Notes – Windows XP will run this automatically every three days or so, during system idle periods. BootVis will evoke this when you run the “Optimize System”  function. [...]

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:

Go to Start > Control Panel > Administrative Tools > Computer Management, Disk Management, then right-click the partition whose name you want to change (click in the white area just below the word "Volume") and select "change drive letter and paths." From here you can add, remove or change drive letters and paths to the [...]

Right click on an empty area of the desktop and choose ‘new’ -> ‘shortcut.’  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.’

Go to Start->Run->regedit In Registry Editor  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.

By default, WindowsXP turns on a lot of shadows, fades, slides etc to menu items. Most simply slow down their display. To turn these off selectively: Right click on the My Computer icon Select Properties Click on the Advanced tab Under Performance, click on the Settings button To turn them all of, select Adjust for [...]

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.

You can save your desktop settings and secure it from your nerdy friend by playing with the registry. Simply launch the Registry Editor go to: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer In the right pane create a new DWORD Value named NoSaveSettings and modify it’s value to 1. Refresh and restart for the settings to get saved.