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  • Have you tried running CHKDSK manually from Windows 10? What does it say? Looks like Windows 7 is confused by the presence of Windows 10 (normally it should just act as if it was not there, or just a data drive). Have you followed a guide to successfully dual booting 7/10?
    – maxbc
    Commented Nov 2, 2015 at 14:41
  • I'll try the CHKDSK on Windows 10, and on my old PC I was able to successfully dual-boot, and it never did a CHKDSK. I don't think it <bold>detects Windows 10, it just verifys the files, and then it replaced the 'security ID's'; I belive that has something to do with permissions.
    – horIzoN
    Commented Nov 2, 2015 at 16:32
  • I've just done a CHKDSK on 10; it thought everything was fine, no errors at all. I don't know how you fix this... it's really starting to annoy me.
    – horIzoN
    Commented Nov 2, 2015 at 16:39
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    If you'd taken backups it might be easier. There is plenty to shout "why not?" at in How do I restore security settings to a known working state? Any chance of copying your data off the drive and re-installing/refreshing Windows 10?
    – Andrew Morton
    Commented Nov 4, 2015 at 16:56
  • After seeing this, I did copy my Steam folder and a bunch of documents that I did need. I'm gonna go through my data now, and then see what I can do next.
    – horIzoN
    Commented Nov 8, 2015 at 10:14