dllhost.exe using up memory


  1. bigseb
    Posts : 913
    Windows 7 x64 Professional
       New #1

    dllhost.exe using up memory


    This happened about an hour ago... noticed that all my RAM was being used up. Noticed Task Manager listing dllhost.exe using almost all the RAM. Rebooted and it came as soon as I opened an explorer window. Rebooted again with the same result.

    Googling suggests a virus. Is it? I can end the process in TM but it reappears as soon as I open a window. And the RAM keeps climbing until it maxes out. Before I do a complete reinstall (busy backing up data) I would like to know if there is an easier method, assuming it is actually a virus.

    Cheers!
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  3. bigseb
    Posts : 913
    Windows 7 x64 Professional
    Thread Starter
       New #2

    Further testing shows that the dllhost.exe can't be ended once but needs to be ended multiple times before it closes.
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  4. PC LIZARD
    Posts : 30
    windows 7
       New #3

    is it fix /////????? run heard protect..https://www.google.com/search?client...#q=herdprotect could be a bad update clean all temp files and see...my browers is open my AV is runing my CPU is at 0%
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  6. bigseb
    Posts : 913
    Windows 7 x64 Professional
    Thread Starter
       New #4

    Ok, I reinstalled my OS for a fresh start. Installed only the following software: Geomagic Design, Adobe Reader, 7zip, Makerware, Proftweak, MSE and the latest IE. This is software that I need to work. It was downloaded form the usual safe sources. That was on Sunday.

    Last night (Thursday) the dllhost.exe issue was back. How? I trust the software I was using. I only went online to install IE and MSE (from the MS website).

    Some more googlefoo revealed that this is either a Trojan (I don't think so because of my minimal install with trusted software and the fact that it is located in the Windows/System32 folder) or an issue relating to thumbnails. I will try later to apply 'view only as icons' to all folders and see if that helps or an issue with IE.

    Would really appreciate some help here. Thanks.
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  7. UsernameIssues
    Posts : 10,485
    W7 Pro SP1 64bit
       New #5

    You might want to use Process Explorer to check the things that are running on your computer via VirusTotal:

    Process Explorer 16
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  8. bigseb
    Posts : 913
    Windows 7 x64 Professional
    Thread Starter
       New #6

    Ok. Switched off thumbnails, using icons only. Problem solved. Thanks UserNameIssues.
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  10. UsernameIssues
    Posts : 10,485
    W7 Pro SP1 64bit
       New #7

    Thanks for posting the solution.

    If you ever miss thumbnail, we might be able to locate/delete the offending thumbnail database file via Process Monitor.

    Once the thumbnails are correctly generated, the memory usage should drop.
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  11. Ukhoops
    Posts : 5
    Windows 7 64 bit
       New #8

    dlllhost


    how do you switch off thumbnails? I reboot computer or it bsods 98x a day and I see in task manager dlllhost.exe is running at over 1million kb with nothing ever opened at all since reboot???
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  12. UsernameIssues
    Posts : 10,485
    W7 Pro SP1 64bit
       New #9

    Ukhoops said:
    how do you switch off thumbnails?...
    Thumbnail Previews - Enable or Disable
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