how to uninstall windows xp sp3 rc 2

Hello,
on 1 domain with 500 clients i have discovered that 60 clients are builded with windows xp sp 3 rc. build was deploy on top of windows xp sp2
Now , I can't find any info on how to uninstall sp3 rc2 and i  have already tried on few of them by uising add remove program but different error occurred and sp3 rc2 cannot be successfully uninstall.
system restore is not always a valid option on this domiain and there is no back up.
Is there any way forinstance scripts or manual uniinstall document procedure or microsoft tools that i can use ?
Thanks
prointechAsked:
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prointechAuthor Commented:
The clients have been reimaged . I don't find any tools of info
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nlandasCommented:
Can you just install the release version of SP3 over top and get them onto the latest Service Pack that way? You really want SP3 right?
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prointechAuthor Commented:
yes i need sp3 install on those client. deploy rtm on top of rc2 is not supported by microsoft ( already confirm by them) and i want to uninstall first the rc2  and deploy again sp3 rtm
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arnoldCommented:
Not sure why you went through the process of deploying an RC update on production systems.
Your best bet is to do a repair install which will reset the installation to the version of the OS on the CD without loosing any user data.
boot from the CD select install rather than repair console. On the second pass you will be provided an option for repair install.

SP3 as is SP3 RC are a combination package of multiple individual updates.  If you know when the updates were installed, you could try using add/remove and checking the display update option and then going through the updates that appear to have been installed on the SP3 R2 Date.  you would need to remove each one at a time.
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prointechAuthor Commented:
not valid solution have been provided by others peers
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