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Level 8

Error -5001: 0x8000ffff after restart. Urgent!!!

I have an InstallScript project that was written in InstallShield 12. I've now upgraded the project to 2012 Spring.
After I install my product, and restart my machine, I'm getting Error -5001: 0x8000ffff.
Searched a lot through the posts..but couldnt solve.
Anyone knows how to get rid of this???

Please help!! Thanks much in advance.
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Level 6

Your registry has likely gotten hosed. We have encountered this when installshield gets confused - especially when executing an upgrade. could never figure out why. [to be clear - we ran into this when executing our installer....]

We found we had to manually delete all files and registry entries and the software\Microsoft\windows\current version\uninstall entry.
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