Virus Scan On Bootup

  1. Posts : 1
    windows 10

    Virus Scan On Bootup

    My problem is this:
    Every time my laptop running windows 10 boots up, windows defender spends 10 minutes taking up 100% of my drive and cpu doing i don't ****ing know what.

    I've been unable to find a solution to this problem.
    I've tried many solutions over the past few months, but nothing seems to work.

    From excluding all folders from being scanned, to editing my scheduled scans, to installing other programs to override defender, and going into the registries to disable it entirely.
    Nothing. Works.

    Every time I boot up I'm stuck unable to do anything for several minutes until windows defender is no longer taking up 100% of my stuff.

    I don't have any malicious programs running, I've checked.

    I really don't want to do a fresh install but I think I've done it before and it didn't work.
      My Computer

  2. Posts : 819

    Have you tried this --

      My Computer

  3. Posts : 25,107
    10 Home x64 (21H2) (10 Pro on 2nd pc)

    trojan24 said:
    My problem is this:
    Every time my laptop running windows 10 boots up, windows defender spends 10 minutes taking up 100% of my drive and cpu....

    Welcome to Ten Forums trojan24.

    I think you may find that defender isn't the true culprit, rather it gets dragged into the mix as the real culprit reads files from your system drive.

    That would be SuperFetch (as it was named in earlier versions) or SysMain as it is now known. This is a process that spends the first 5-10 minutes after start up reading your most commonly used programs to cache them in memory for fast access.

    Try disabling SuperFetch, especially if you have an SSD where it is of little benefit.

    SuperFetch keeps track of which applications you use most and loads this information from the hard drive into RAM so that programs load faster than they would if the hard disk had to be accessed every time. Windows SuperFetch prioritizes the programs you’re currently using over background tasks and adapts to the way you work by tracking the programs you use most often and pre-loading these into memory...

    ...Starting with Windows 10 build 17763.1, the SuperFetch service has been renamed to SysMain.
    Enable or Disable SuperFetch in Windows
      My Computers

  4. Posts : 913

    This may help a bit although kicking out the whole defender swamp & using some real antivirus software is much better.

    Use command

    Parameters of interest:

    I never allow defender to run on my machines so not tested.
      My Computer


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