Huge files (30+GB) creating themselves in c:/windows - Help !

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  1. Posts : 10
    Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
    Thread Starter
       #11

    I located one of the files in Process explorer, but when I try to close the handle, it says :"Error opening process : The handle is invalid."
      My Computer


  2. Posts : 6,330
    Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64 +Linux_VMs +Chromium_VM
       #12

    Does the handle show you what Process (program) is using that file ?
      My Computer


  3. Posts : 10
    Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
    Thread Starter
       #13

    It just says system...
      My Computer


  4. Posts : 6,330
    Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64 +Linux_VMs +Chromium_VM
       #14

    If it was me, I'd be concerned it could be Malware, or it could also be legitimate files for some program / updates.

    What i would do:
    Boot up in Safe Mode and see if the files are not locked and i could rename them.
    They may be too big to delete and wouldn't be kept in the Recycle Bin.
    Safe Mode

    If i can see them and rename them in Safe Mode, try a Clean Startup and see if there are any issues.
    Troubleshoot Application Conflicts by Performing a Clean Startup

    I'd want to try and find out where the files came from.
    In the end i would restore a Macrium System Image backup from before the problem started.
      My Computer


  5. Posts : 10
    Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
    Thread Starter
       #15

    I managed to get rid of one og them. I had 30GB freed, but the files came back at the next startup.

    They are actually building up on the boot. Their date of creation matches the time I start the PC...
      My Computer


  6. Posts : 6,330
    Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64 +Linux_VMs +Chromium_VM
       #16

    How did you get rid of one of them ?
    Did you boot in safe Mode and delete it ?
    If that's the case, does it get re-created if you reboot into Safe Mode, or Clean Startup ?
      My Computer


  7. Posts : 10
    Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
    Thread Starter
       #17

    I was given a script with FRST64. It managed to delete one 32GB file, but it went back the rboot after.... I am still in the sand.
      My Computer


  8. Posts : 25,847
    Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
       #18

    Thank you David for coming to help.

    Well something is putting those things back into your system.

    A picture of Disk Management might be helpful.

    A tutorial by Golden:

    Disk Management - Post a Screen Capture Image


    You could try unhooking all drives except the drive with Windows 7 on it.
    Delete a file and reboot and see if it stays gone.

    **Just to be sure did the thing come back when you did a clean startup??
      My Computer


  9. Posts : 10
    Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
    Thread Starter
       #19

    Here it is, but I do not see anything special.

    I'd rather not unmount my volumes though... I run a lot of drives, and all was working perfectly for more than one year...

    Yes the files are remade on the startup. I don't know with what.

    Since I succeeded erasing one file, I copied 30GB on c:/ of my own file.
    So when the computer start, it maxes out c:/, but then I erase my 30GB file so I can work.
    I need to copy it back before closing though...
    Attached Thumbnails Attached Thumbnails Huge files (30+GB) creating themselves in c:/windows - Help !-screnncap.jpg  
      My Computer


 
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