You might need to remove it via the Recovery Console
http://support.microsoft.com/default.aspx?kbid=875350
How to remove Windows XP Service Pack 2 from your computer
http://support.microsoft.com/default...t=windowsxpsp2
How to use the Automatic Recovery feature to recover your computer if the Windows XP Service Pack 2
Setup program is not completed successfully
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===========================
TaurArian [MS-MVP] 2005-2006
===========================
"mariacarmen" <> wrote in message
news:0CDB2C33-AF3E-468E-A914-...
> Two days ago, the SP2 installation I attempted was interupted by a momentary
> power shortage. (I couldn't believe it!) After restarting the computer, it
> gave the following message:
>
> "The Windows Service Pack Installation did not complete. This system is in
> an unstable state. Go to Control Panel Add or Remove Programs, and choose to
> u ninstall the Windows Serivce Pack, or contact your system administrator."
>
> At first, when I rebooted the computer, I was not brought to the sign in
> screen. I could do nothing. So I turned off the computer manually. The
> computer then informed me that it was going to run ChkDsk, but that took only
> seconds. Although it took quite some time to completely boot after that, I
> could then access the sign in screen, and I can open and use most programs.
> As you can see, I can also access the Net.
>
> Unfortunately, I cannot access Control Panel to delete the Service Pack 2.
> When I try to open it, I get the following message:
>
> "Explorer.exe has encountered a problem and needs to close. We are sorry for
> the inconvenience. If you were in the middle of something the information you
> were working on may be lost."
>
> MY QUESTIONS: How to access Control Panel now? And will deleting the entire
> Service Pack 2 download (over 300 mg on a dial up connection!) correct the
> unstable state of my Windows XP Home Edition?
>
> Btw, I am running Windows XP Home Edition, V. 2002, Svc. P. 1 on a Pentium 4.
>
> Thank you in advance for any help!