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[–] alloygeek 0 points 2 points (+2|-0) ago 

I've had to do it for client's machines- so far my record is 15-2. It is ugly if it goes bad. I had two go well, but they didn't have any programs installed to speak of (just Firefox/office).

I'd do a full backup, try the uninstall and be prepared to revert via your backup, do a clean install and copy the files manually back.

Good luck.

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[–] HomerSimpson 0 points 4 points (+4|-0) ago 

I did. You basically lose all software you installed to your computer. Mostly only noticed this with games. Regular files seem to just stay.

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[–] phly95 3 points -2 points (+1|-3) ago  (edited ago)

I went to Windows 7 using my downgrade rights, but Bluetooth had this terrible glitch that it would make this buzzing noise like when you plug headphones into a public computer. My battery life was also worse. I decided to go back to Windows 10 after that. The Bluetooth support on Windows 7 is really subpar, but Windows 8 would work fine for those issues.