A critical bug revolving around the Customer Experience Improvement Program has been causing beta testers errors whenever an .msi installer is run or when performing a Windows Update. There is an interesting story behind this bug since it was originally fixed by Windows 7 testers themselves that you can read about here.
Above are the official instructions on how to fix the error. The steps are pretty simple and simply involve deleting a registry key.
The difference between this fix and the previous ones from the hackers is that CEIP does not have to be shut down. If you want a “quick-fix”, I’ve created a .bat file that does everything above for you. Just make sure you right click it and Run as Administrator.

You can download the quick-fix here.
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Tags: windows 7, windows 7 CEIP fix, windows 7 customer experience improvement program
I have tried both fixes (shutting down CEIP and deleting the registry key). This has done nothing. I’m still not able to install anything (well, anything MSI related). I can’t install drivers, I can’t install games, nothing. Honestly, I’ve only been trying games, but that shouldn’t make a difference.
Tonight, I couldn’t even install any windows updates, but restoring to 3/10 seemed to bring back windowsupdate. But I don’t have a restore point taking me far back enough to avoid the bug.
I’m thinking of going back to vista (or maybe XP). Help me, RC1! You’re my only hope.