Trouble with sevice pack 1 install on dual boot system

[bigfrank62]

Looking for some help guys.
I have dual hard drive, dual boot system. Win 7 Ultimate and XP Pro. I have not updated to win 7 sevice pack1 and now find that I can't. It downloads and installs sort of and then reverses the install.
I have read it has something to do with how it boots but can't figure it out.
Can anyone explan it to me in simple terms what I need to do?
Thanks

 

[NoelDP]

Which OS was installed first? What bootloader is in use?


Please follow the Windows Update Posting Instructions and post the requested data
If the file is too large (8MB compressed), remove the older CBSPersist cab files until the final file is below the limit - you can always post them separately after zipping them. (the forum doesn't allow the upload of bare CBA files, for a number of reasons)

 

[bigfrank62]

When I bought it a few years ago from an ebay seller it had Vista and xp. I installed Win 7 over the Vista. Disc management shows boot on the Win 7 drive it that's what you are asking, thanks

 

[NoelDP]

Oh dear
What version and edition of Windows is the machine licensed for - according to the COA sticker on the case?


Please follow this tutorial and post an MGADiag report.

http://www.sevenforums.com/windows-updates-activation/234159-windows-genuine-activation-issue-posting-instructions.html

Ignore errors produced when clicking on the Copy button - they simply mean that the tool could not create the backup files for some reason. The data is still copied to the clipboard for pasting to your response.