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Solved Windows Defender wont turn on. Conflict perhaps?


#1
Greetings,

My name is Caleb, and i'm having some issues regarding my Windows Defender. When I go into Action Center and try to turn on Windows Defender and Windows Firewall, it doesn't want to turn on.

When I click on "Take Action", and click on "Turn on Windows Defender", User Account Control then prompts me if I want to run this application. I click yes, after doing so, Windows Defender still doesn't become enabled.

I do have malwarebytes installed on my PC, is this causing some sort of conflict between Windows Defender and malwarebytes since its a AV?
 

My Computer

System One

  • OS
    Windows 8.1

CountMike

Well-Known Member
VIP Member
Guru
Belgrade , Serbia

Posts
4,664
#2
Do you have now or ever had any other antivirus installed ?
 

My Computer

System One

  • OS
    Windows 8.1 Pro
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Home made
    CPU
    AMD Ryzen7 2700x
    Motherboard
    Asus Prime x470 Pro
    Memory
    16GB Kingston 3600
    Graphics Card(s)
    Asus strix 570 OC 4gb
    Hard Drives
    Samsung 960 evo 250GB
    Silicon Power V70 240GB SSD
    WD 1 TB Blue
    WD 2 TB Blue
    Bunch of backup HDDs.
    PSU
    Sharkoon, Silent Storm 660W
    Case
    Raidmax
    Cooling
    CCM Nepton 140xl
    Internet Speed
    40/2 Mbps
    Browser
    Firefox
    Antivirus
    WD

Borg 386

ADHD member
VIP Member
Pro User
#3
If you are running the free version of Malwarebytes, this wouldn't be a an issue as it is an "on demand" scanner. If you are running the pro version, then there shouldn't be a conflict. (Source)

This action could be caused by 1) As CountMike pointed out, another AV being installed which would by default, disable Defender & the MS Firewall or 2) You have malware which is preventing the initialization of these item.

If in the past you had an AV installed, it my not have uninstalled cleanly. If this is the case, go to this site & choose your AV uninstaller & run it.

Uninstallers (removal tools) for common Windows antivirus software - ESET Knowledgebase

Note: If you believe you are malware free, have had no prior AV or have run the uninstaller & are still having problems, you may wish to run a SFC /SCANNOW. Be sure to run it 3X as it doesn't always fix everything the 1st or 2nd time around.

If SFC could not fix something, then run the command again to see if it may be able to the next time. Sometimes it may take running the sfc /scannow command 3 times restarting the PC after each time to completely fix everything that it's able to.
http://www.eightforums.com/tutorials/3047-sfc-scannow-command-run-windows-8-a.html
 
Last edited:

My Computer

System One

  • OS
    Win 7 32, Win 7 64 Pro, Win 8.1 Pro
    Computer type
    PC/Desktop
    System Manufacturer/Model
    It's a Dell, Dude.
    CPU
    Intel Caffinated Core Duo
    Motherboard
    Father is bored too.
    Memory
    4 GB
    Graphics Card(s)
    NVidia something-or-another
    Monitor(s) Displays
    24" HD TV/Monitor/Alternative Dimensional Viewing Portal
    Screen Resolution
    Fuzzy after a couple drinks
    Hard Drives
    2 or 3, depending on if it's a night they're arguing about having a "split personality crisis" because I partitioned the drive.
    Case
    Don't get on my case....man
    Cooling
    Scotch on the rocks on the weekends..
    Keyboard
    Mad Catz Cyborg V7. Or maybe Cyborg Catz Are Mad At V7's??? I know it lights up...far out.
    Mouse
    currently being stalked by the cat...
    Internet Speed
    Never fast enough...
    Browser
    Defeated by Mario...wait...OH...BRowser...
    Antivirus
    Various
#4
CountMike, No, I never had any other antivirus installed. The only antivirus i've ever installed specifically on this PC is Malwarebytes the free version. Borg 386, Thank you for the information, i'll most certainly keep what you said in mind.

Also, I do have the situation solved. It turns out that Malwarebytes was causing conflict with the Windows Defender, all I did was uninstall Malwarebytes and reinstalled it to fix the issue. My Windows Defender is on and so is my firewall.

Thank you, CountMike & Borg 386, you're answers most certainly helped me resolving this simple issue. I'm sorry I didn't reply to this in a timely manner, i've been extremely busy with school!
 

My Computer

System One

  • OS
    Windows 8.1

Borg 386

ADHD member
VIP Member
Pro User
#5
Glad you got it sorted. :D I'm must admit I'm somewhat surprised though, usually Malwarebytes plays well with other software.
 

My Computer

System One

  • OS
    Win 7 32, Win 7 64 Pro, Win 8.1 Pro
    Computer type
    PC/Desktop
    System Manufacturer/Model
    It's a Dell, Dude.
    CPU
    Intel Caffinated Core Duo
    Motherboard
    Father is bored too.
    Memory
    4 GB
    Graphics Card(s)
    NVidia something-or-another
    Monitor(s) Displays
    24" HD TV/Monitor/Alternative Dimensional Viewing Portal
    Screen Resolution
    Fuzzy after a couple drinks
    Hard Drives
    2 or 3, depending on if it's a night they're arguing about having a "split personality crisis" because I partitioned the drive.
    Case
    Don't get on my case....man
    Cooling
    Scotch on the rocks on the weekends..
    Keyboard
    Mad Catz Cyborg V7. Or maybe Cyborg Catz Are Mad At V7's??? I know it lights up...far out.
    Mouse
    currently being stalked by the cat...
    Internet Speed
    Never fast enough...
    Browser
    Defeated by Mario...wait...OH...BRowser...
    Antivirus
    Various

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