Windows 8 and 8.1 Forums


What would make Windows defender scan for 58 hours?

  1. #1



    I am Woman! Hear Me Roar!
    NJ
    Posts : 1,116
    4 Windows 7 Pro Sp1- 4 Win 8 Pro, 1- xp pro sp3

    What would make Windows defender scan for 58 hours?


    i have a client running windows 8.1. on a touchscreen laptop. He set a full scan and it was running for 58 hours till he finally shut it off.
    He also has malwarebytes and on a full scan it took 2 days to finsih
    Quick scans take about a half hour
    I am getting his laptop this afternoon to try to figure this out but I wanted some suggestions please

    thanks
    robin

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  2. #2


    Harrisonburg, Va.
    Posts : 10,488
    Windows 8.1.1 Pro with Media Center


    Maybe run

    Dism /Online /Cleanup-Image /RestoreHealth

    &


    sfc /scannow
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  3. #3


    Posts : 1,875
    Windows 10 Pro Prieview x64


    How many items are being scanned? I get about 20k per minute on Defender. How many are scanned after (ouch) 58 hours?

    EDIT: I left full scan running while I went to the supermarket. When I came back it was 1hr 2 minutes for 156k so about the same rate. If it is significantly slower for you (like orders of magnitude) you have a problem. Something is locking an object perhaps. If the rate is OK then perhaps you are checking a huge amount of items - not just on C:/ but elsewhere.

    Just a thought. Please try it and see your rate and whether you are scanning (for example) removable drives when you run a full scan. Look in Settings tab, Advanced.
    Attached Thumbnails Attached Thumbnails Capture.PNG   Capture.PNG  
    Last edited by adamf; 27 Dec 2013 at 14:11.
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  4. #4



    I am Woman! Hear Me Roar!
    NJ
    Posts : 1,116
    4 Windows 7 Pro Sp1- 4 Win 8 Pro, 1- xp pro sp3


    i am going to look at the settings and see what is scanning, the same for Malwarebytes and David, thanks I will try that also
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  5. #5


    Posts : 1,875
    Windows 10 Pro Prieview x64


    Quote Originally Posted by robinb9 View Post
    i am going to look at the settings and see what is scanning, the same for Malwarebytes and David, thanks I will try that also
    Well Robin, my full scan still has not finished. I guess it is worth doing anyway. 227k in an hour and three quarters.

    I believe I've seen you on 9 forums already right? Same guy/girl?
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  6. #6


    Posts : 328
    Windows 8.1 (x64)


    First you should make sure the PC is fully updated.

    Second, check if there's no other antivirus installed, this sounds a lot like your problem. This might come from an old antivirus app which was not uninstalled properly, check this for uninstallers : List of anti-malware product removal tools - Microsoft Community. I would also disable malwarebytes real time protection if it's on.

    Before running a full scan it's recommended to clear your cookies / internet temporary files and all the temporary files you can find (this should lower the total files to scan significantly).
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  7. #7



    I am Woman! Hear Me Roar!
    NJ
    Posts : 1,116
    4 Windows 7 Pro Sp1- 4 Win 8 Pro, 1- xp pro sp3


    Quote Originally Posted by adamf View Post
    Quote Originally Posted by robinb9 View Post
    i am going to look at the settings and see what is scanning, the same for Malwarebytes and David, thanks I will try that also
    Well Robin, my full scan still has not finished. I guess it is worth doing anyway. 227k in an hour and three quarters.

    I believe I've seen you on 9 forums already right? Same guy/girl?
    not, guy, not girl, but woman, lol and yep that is me
      My System SpecsSystem Spec

  8. #8



    I am Woman! Hear Me Roar!
    NJ
    Posts : 1,116
    4 Windows 7 Pro Sp1- 4 Win 8 Pro, 1- xp pro sp3


    Got his computer and noticed windows 8 not 8.1 is on it, did a bunch of scans, took off a few spyware, cleaned all temp files, did a chk disk and defrag, checked to make sure all security updates were done, only one antivirus program is on, ran ccleaner and removed old registry items. Tomorrow will put 8.1 on and see if it cleans up the problem
    btw quick scans run 15-20 min. Have not checked long scans but i did check settings and found it was doing archives which could be why it was taking so long
    will let you know once i put 8.1 on and sees what happens
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  9. #9



    I am Woman! Hear Me Roar!
    NJ
    Posts : 1,116
    4 Windows 7 Pro Sp1- 4 Win 8 Pro, 1- xp pro sp3


    now I cleaned everything up on this computer, took off a bunch of spyware, updated any drivers, prepared it for windows 8.1. During this whole thing I noticed he has 3 partitions on the drive, 1 is C one is E (recovery with 25gigs) one is F (another recovery with 10 gigs). When looking at Windows defender when it does a full scan it scans ALL Drives unless you do a Custom Scan and pick which drive. I have a feeling it was getting stuck on the E/F drive because when I tried clicking on them, Windows came up and said I could not get it, it was protected. So I am assuming neither could WD and that is why it took so long to do a scan. But I still continued to prepare it for 8.1
    After installing 8.1 and checking everything out I did a custom scan and scanned only the C drive
    The scan took 1 hour.

    And I tell my clients not to do a full scan unless something is suspected, if he got a Trojan or virus. I tell them to do a weekly Quick scan.
    So everything now is great! I think he will be very happy with the results especially since he was so frustrated with windows 8 (besides I put on Classic Shell to make it a bit more user friendly and tweaked Windows 8.1 in the Metro side to make it also more user friendly.
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  10. #10


    Nice job robin9...wish they were all that easy....lol.
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