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To fix this, run a command prompt as administrator, type in chkdsk C: /f /v /x and schedule a reboot.Įither way, Windows8_OS is not the problem. Also, your file system may have been corrupted so it is showing incorrect values. There are other possibilities, such as a runaway media cache, a PC that is creating too many system restore points, or an overgrown Windows search index file (windows.edb). If they don’t find anything, restart your PC in safe mode with networking and run them again. Run a spot check with a different anti-virus product such as Malwarebytes, Kaspersky or Hitman Pro, as mentioned in a recent answer. The most likely “bad thing” is that your PC has a malware infection.
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When it isn’t, it rings alarm bells that suggest something bad is happening.
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Now, disks usually take a few years to fill up, and the process should be too gradual to notice.
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