My Lenovo Z50 laptop has been giving me problems, so I set it to run CHKDSK /f /r /x when I rebooted.
Several hours later, it's stuck at 12%. The dots are circling, so I suspect I should let it finish except for a few issues:
1) Some people have let theirs run for days, and I can't wait that long.
2) It may be stuck rather than just slow. (I've seen cases where dots continue to circle even if the process has actually frozen.) Since it's on the reboot screen, it doesn't show progress.
On the other hand, interrupting CHKDSK can cause hard drive damage. On the other other hand, I don't know how to interrupt it other than powering off the computer.
When is it reasonable to shut it down, and how to do so safely?
(I saw two similar questions on SuperUser, but they don't actually answer my questions.)
EDIT: I let it run overnight. In the morning there was a blue screen reading "Automatic Repair Failed". I clicked "Shut Down"; tonight I'll try to repair it.
EDIT 2: @Davidgo says don't try to repair it; the drive is failing. Okay, but before I ran CHKDSK I got a bluescreen error with the stop code "Memory Management". This was the second time in the past week. Does my laptop actually have two problems?