You don't do a full system upgrade without: a) Backing up all personal files. b) Taking a disk image (built into Windows from 7 and up.) I take three images just in case.
Backup. Backup. Backup. The old saying is, you can't have enough.
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"I say we take off, nuke the site from orbit. It's the only way to be sure."
Corporal Hicks
(Actually Ripley said it first.)
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