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Message: [QUOTE="jim p, post: 41842, member: 13099"] after upgrading from Windows 7 to 10, I noticed a mysterious read-only directory containing 528 GB (567,589,994,496 bytes) in 2,506 Files. The file names in the directory are also mysterious, e.g., C:\4X+jVhn6+X0xHOX4K2\!!Uv 7pb R+Gm8CrCR. Disk Cleanup (including System Files) did not remove these files. What are these files? What app(s) use these files? (Hopefully, nothing i care about.) Is it safe to remove these files? How can I safely remove them to free up space on my laptop? [/QUOTE]