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I have running Windows 2008 Server machine on my SSD disc from VHD file. Today while I was working with Windows the 30% of files disappeared. There are only folders left and no files. I can't find some of files in User folder and Program Files but not all. I can't start any program but Windows working fine. Maybe someone know what is going on?

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Have you made any changes to the machine because it sounds like something has become corrupt. You might have to restore from a backup that you do have....right? – TylerShads Nov 23 '11 at 13:49
@Shads0 I just working with Visual Studio 2010 and suddenly the running programs have started faulting. I have checked HDD(c:) and the free space increased by about 30% in my eyes. Never saw anything before. I can't start any program or find my personal files but strange thing is that Windows itself running fine. – Tomas Nov 23 '11 at 13:56
@Tomas You do have a backup for the machine, right? (Hint hint) – TylerShads Nov 23 '11 at 13:58
Yes, I have VHD file backup, but I would like to find out what is just happened with my OS. – Tomas Nov 23 '11 at 14:06

You might suffer from a filesystem corruption. Run chkdsk /F <your drive> to check for possible errors. You might have to restart your system if <your drive> is the system drive.

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Done that and got no errors. – Tomas Nov 23 '11 at 21:14
The next shot would be a malware infection. Try scanning with an AV of your choice. – the-wabbit Nov 23 '11 at 21:29

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