Windows 10: Windows Defender Performs Full Scan and Custom Scans, Won't do offline scan since last month

Discus and support Windows Defender Performs Full Scan and Custom Scans, Won't do offline scan since last month in AntiVirus, Firewalls and System Security to solve the problem; I was able to perform a full scan, and a quick scan which did not find any malware. Neither did Eset or Trend Micro Housecall. I was able to run an... Discussion in 'AntiVirus, Firewalls and System Security' started by M W 67, Mar 1, 2021.

  1. M W 67
    M W 67 Win User

    Windows Defender Performs Full Scan and Custom Scans, Won't do offline scan since last month


    I was able to perform a full scan, and a quick scan which did not find any malware. Neither did Eset or Trend Micro Housecall. I was able to run an offline scan last month, but cannot do so now on my HP laptop. I was able to do so in my old Toshiba laptop. The HP is newer. I have run the scannow which did not reveal corrupt files. Is there any way I can uninstall and reinstall Windows Defender to fix the issue? When I look at my task manager there is nothing untoward/suspect. When I tried to run lines in PowerShell, they didn't work. Command says it cannot find file. Same thing with commands in Command Prompt. Searching online shows this has been a Windows issue for years. This has never happened to me before and I have been running Windows on various computers since 2003...starting with XP, 7, 8, and 10.

    :)
     
    M W 67, Mar 1, 2021
    #1
  2. STEVE C
    Steve C Win User

    Defender Periodic Scanning or Offline Scanning?

    That link does suggest it's useful to use Defender offline scanning in addition to periodic scanning and a third party real time anti virus (e.g. Kaspersky).
     
    Steve C, Mar 1, 2021
    #2
  3. BTC55
    BTC55 Win User
    Windows Defender - Quick Scan

    Windows defender no longer offers a quick scan option.

    My options are:

    • Scan
    • Advanced Scan
    • Full Scan
    • Custom Scan
    • Windows Defender Offline scan
    Whichever option I check, the scan will need to run for hours to complete.

    Is a quick scan available?

    How do I restore this feature?
     
    BTC55, Mar 1, 2021
    #3
  4. JOEJY
    JoeJY Win User

    Windows Defender Performs Full Scan and Custom Scans, Won't do offline scan since last month

    Windows defender custom scan does not scan external drives

    I have Defender Windows 10. I tried using custom scan to select and scan external drives. The screen listing the drives comes up, but the "OK" button remains grayed out so unable to scan any of the drives listed. Any suggestions would be appreciated.
     
    JoeJY, Mar 1, 2021
    #4
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Windows Defender Performs Full Scan and Custom Scans, Won't do offline scan since last month

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