Hello andreibr,
1. Are you logged in as an Administrator on your computer?
I suggest that you have a look at the below thread that talks about the same issue:
Thanks,
Irfan H, Microsoft Answers Support Engineer
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I have roughly the same problem. Was running with a C, D, E and F drive partition. One day both my E and F (logical) drives disappeared. I was able to get them back until I restarted the computer. The drives disappeared again. In disk management only the C and D drives are listed and alot of unallocated space. I recreated two logical drives and ran a disk check. Everything was fine...until I restarted the computer. They disappeared again.
The day they disappeared, I did get 3 VDS errors in event viewer. Is this related to the problem and will a reformat fix this?
I am running my computer in administration mode.
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