Learn how to uninstall and remove Windows Vista Service Pack One from your Vista computer using the Command Line:
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Click Start, expand All Programs, and expand Accessories.
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Right-click Command Prompt, and then click Run as administrator.
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In the command window, type the following and press ENTER:
start /w pkgmgr /up: VistaSP1-KB936330~31bf3856ad364e35~x86~~6.0.0.<build number>
Note
To uninstall SP1 from a 64-bit computer, replace x86 with amd64 in this command. Replace <build number> with the appropriate build number you are uninstalling. For example, for the Vista SP1 RC Preview, the build number is 17042.
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Wait for the command to complete (there is no progress indicator), and then restart the computer when prompted.
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To confirm that uninstallation of Vista SP1 was successful, click Start and type winver in the Start Search box. The reported build version should be 6000.
Find this article at: http://www.labnol.org/software/tutorials/remove-uninstall-windows-vista-sp1-service-pack/2192/
Tags: how to, uninstall, vista sp1, windows vista, Software, Tips, Tricks, Tutorials
Reader Comments
i did exactly what you said. tried both x86 and amd64, put in my build number which is 6001 and it says “operation failed with 0×80070057, the parameter is incorrect.”
Written by dylan on 08.28.08
I did the same and the same happened on one computer and not the other.. except it was the computer that I need it to do it to. to fix plus and play software device enumerator. didn’t work to uninstall sp1 same error code.
Written by Cassey Hayles on 12.17.08