500GB Disk space unaccounted for

Microsoft? UNKNOWN
May 27, 2010 at 14:48:34
Specs: Windows 7
So I was playing a simple game when it froze. ctrl alt del and i closed the game. Since this was my first crash in a while I thought I might as well run disk defrag while i was fuming over my rather large loss of progress in my game due to my not saving. When I opened my computer I noticed my C: drive's capacity was in red. I opened it's properties and seen that my hard drive was nearly full to the point where saving a notepad would have been impossible. I immediately ran disk clean up, along with un installed some other programs just to free up some space. I managed to about 30 GB. I then went and added up all the files on that drive (I have 2 hard drives). The total came too 17.7GB for the entire drive. I am unable to run disk defrag due to the large volume I am guessing. I do not understand how 500+ GB of space can have been used in just a few days, as I remember a few days ago my drive only used under 100 GB and had 500+GB free. I looked online and downloaded CCleaner but no help. I have attempted to look for hidden files but I can not locate what is taking up so much space. I included my media (music, pictures, and video) and only found 7GB. Any ideas? The harddrive is a 600GB HD. File system is NTFS. Version and drivers up to date. I cleared my system restores to only the most recent and to my knowledge I haven't made any back ups. There are no guest accounts so I don't think it would be an issue from having multiple profiles seeing as mine is the only one. Any advise would be greatly appreciated. Let me know if you need further info.
Thanks

See More: 500GB Disk space unaccounted for

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#1
May 27, 2010 at 22:34:15
Any chance you picked up a virus or other malware?

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#2
May 28, 2010 at 03:04:41
I have Avast and have run a complete scan of the system. I was able to do a defrag but it took a while and it was just a quick defrag. I also did a scan disk at boot which didn't help either. Are you aware of any virus's that would do this? Thank for your reply.

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#3
May 28, 2010 at 04:09:22
Boot off a Windows XP CD, choose the second repair option, the Recovery Console, select your HD at the prompt, log into it, and run "chkdsk c: /p" replace c: with whatever HD it is you wish to scan.

There is a bug in NTFS under certain circumstances that will report your HD as full after a crash. Running check disk at boot up time, or from a bootable win XP cd will correct this error.

99% sure this ISN'T your issue, but I have run into it several times with missing HD space.

If this is not your issue, start at root (C:\) and see which folders are taking up all the free space, you might by chance find a folder with a corrupt text file in it being mis-reported as taking up your 500gb's. For instance under certain circumstances an old HP app called SNMP.exe, installed from the factory on HP systems, would keep on crashing and relaunching itself, it created an error report at every crash, several crashes in a few seconds and it added up to a directory with thousands of log files equaling something like 20gb's of junk space.

PowerMac 9600(1 ghz G4)
512mb RAM
50gb SCSI
ATi 9200 PCI


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#4
May 28, 2010 at 15:48:53
I did the boot scan method already, I did not uses a win XP disk to do it though. Did not solve the problem. Would it have to be a win XP disk needed? Also by "Root" are you refering to going into the my computer and looking at the files that way? If so I tried something similar by adding up all the files and folders, but I was only able to account for about 70GB. I just went to Windows 7 about 3 or 4 months ago, so I havent had time to really put alot on the computer.

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#5
May 30, 2010 at 20:44:42
Okay, I haven't installed any programs and now my C: drive is saying it only has 15.3 MB. I am at a loss. The computer has started to display warnings that space is too low and to uninstall items. Does anyone have any further suggestions?

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#6
January 13, 2011 at 14:32:40
I just posted the same problem. Did you ever get this resolved?

http://www.computing.net/answers/ha...


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#7
January 14, 2011 at 08:39:45
Use SCDiskinfo Lists folder sizes in a tree view so you can see where data is being dumped / collected

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