How to make Windows XP Pro 100% Genuine

1. Open notepad and paste the following code:

Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion]
"CurrentBuild"="1.511.1 () (Obsolete data - do not use)"
"ProductId"="55274-640-1011873-23081"
"DigitalProductId"=hex:a4,00,00,00,03,00,00,00,35,35,32,37,34,2d,36,34,30,2d,\
31,30,31,31,38,37,33,2d,32,33,30,38,31,00,2e,00,00,00,41,32,32,2d,30,30,30,\
30,31,00,00,00,00,00,00,00,86,56,4e,4c,21,1b,2b,6a,a3,78,8e,8f,98,5c,00,00,\
00,00,00,00,dd,da,47,41,cc,6b,06,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,38,31,30,32,36,00,00,00,00,00,00,00,b5,16,\
00,00,83,83,1f,38,f8,01,00,00,f5,1c,00,00,00,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,66,e5,70,f3
"LicenseInfo"=hex:33,b7,21,c1,e5,e7,cd,4b,fd,7c,c6,35,51,fd,52,57,17,86,3e,18,\
d3,f4,8c,8e,35,32,7b,d1,43,8d,61,38,60,a4,ca,55,c9,9a,35,17,46,7a,4f,91,fc,\
4a,d9,db,64,5c,c4,e2,0f,34,f3,ea
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\WPAEvents]
"OOBETimer"=hex:ff,d5,71,d6,8b,6a,8d,6f,d5,33,93,fd

2. Save the *.txt file, and rename it "Filename.reg".

3. Run it. (Or right click, and select "Add to registry").

That’s it! Validation Complete!

Thank you for validating your copy of Microsoft Windows. Thank you for using the Windows Genuine Advantage program. You may now access resources for genuine Windows users.

Go to http://www.microsoft.com/genuine/downloads/FAQ.aspx, click Validate Windows - you should be able to apply these updates:

Downloading Microsoft .NET Framework version 1.1 (update 1 of 5)… done!
Downloading Windows Malicious Software Removal Tool - April 2008 (KB890830) (update 2 of 5)… done!
Downloading Security Update for Microsoft .NET Framework, Version 2.0 (KB928365) (update 3 of 5)… done!
Downloading Root Certificates Update (update 4 of 5)… done!
Downloading Windows Internet Explorer 7 for Windows XP (update 5 of 5)… done!
Initializing installation… done!
Installing Microsoft .NET Framework version 1.1 (update 1 of 5)… done!
Installing Windows Malicious Software Removal Tool - April 2008 (KB890830) (update 2 of 5)… done!
Installing Security Update for Microsoft .NET Framework, Version 2.0 (KB928365) (update 3 of 5)… done!
Installing Root Certificates Update (update 4 of 5)… done!
Installing Windows Internet Explorer 7 for Windows XP (update 5 of 5)…

Regular Updates should work fine as well.