Windows 10, how do i get Windows Defender to STOP virus scanning all my files when I boot up?
- Thread starter syP
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When I turned Defender off, it stayed off, IIRC. I'd check the settings page for Defender if you haven't already done so. Run some other virus scans, too, just in case. I run Spybot Search and destroy occasionally to clean up anything Avast misses.
Worst case scenario, save your data and reformat.
Tinfoil may have better answers when he sees this.
Worst case scenario, save your data and reformat.
Tinfoil may have better answers when he sees this.
In Settings, and the Windows Security section click open Windows Security. There is a section in there called App and Browser control. Click that. In there you can turn off "Check Apps and Files". If you know what you are downloading I wouldn't be too worried about this. That should fix what you are experiencing. No guarantees though. I wouldn't let any of my users at work do this, they seem to actively try to find malicious content. But it's off on my machine.
download shutup10 and try that first
O&O ShutUp10++ – Free antispy tool for Windows 10 and 11
With the freeware O&O ShutUp10++, unwanted Windows 10 and 11 features can be disabled and the transfer of sensitive personal data onto Microsoft prevented.
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Before you just shut off Windows Defender, make sure there isn't a schedule set to run a full scan on all files. You will need to look in the Task Scheduler for this.
Defender shouldn't be running full scans at each boot and should only occasionally do quick scans.
In the past, Windows Defender used to cause high CPU and disk I/O because it would try to scan large files that it probably shouldn't be scanning, such as ISO's and video files. I had a video server with huge MP4, MKV, AVI, ISO and other enormous files on it and Defender would get hung up on those. The solution was to put a file type and / or directory exclusion in Defender so it didn't scan those files. If you have a gaming PC, it might be getting hung up on the large gaming files too. On my gaming PC, I had to put exclusions on certain game directories so Defender didn't fuck with them.
You can check to see if this is the case by bringing up Task Manager, then go to the Performance tab and then click Open Resource Monitor at the bottom. In Resource Monitor, click on the Disk tab, and then find the MsMpEng.exe process and then check the box next to it. Then below in the Disk Activity section, you can see what files the process is accessing. Preferably do this while the high CPU issue is occurring. This is how I discovered Defender was scanning media files on my video server.
The MsMpEng.exe is the core Windows Defender engine and will show up in the Resource Monitor if it is active. If it's not currently active, it may not show up there.
Defender shouldn't be running full scans at each boot and should only occasionally do quick scans.
In the past, Windows Defender used to cause high CPU and disk I/O because it would try to scan large files that it probably shouldn't be scanning, such as ISO's and video files. I had a video server with huge MP4, MKV, AVI, ISO and other enormous files on it and Defender would get hung up on those. The solution was to put a file type and / or directory exclusion in Defender so it didn't scan those files. If you have a gaming PC, it might be getting hung up on the large gaming files too. On my gaming PC, I had to put exclusions on certain game directories so Defender didn't fuck with them.
You can check to see if this is the case by bringing up Task Manager, then go to the Performance tab and then click Open Resource Monitor at the bottom. In Resource Monitor, click on the Disk tab, and then find the MsMpEng.exe process and then check the box next to it. Then below in the Disk Activity section, you can see what files the process is accessing. Preferably do this while the high CPU issue is occurring. This is how I discovered Defender was scanning media files on my video server.
The MsMpEng.exe is the core Windows Defender engine and will show up in the Resource Monitor if it is active. If it's not currently active, it may not show up there.
Turn it "off" and exclude all your drives. You never ACTUALLY turn it off, only permanently "pause" it.
Welcome to Windows 10. Where idiots, who shouldn't have ever been shown the internet, are coddled like children at the detriment of us all.
Welcome to Windows 10. Where idiots, who shouldn't have ever been shown the internet, are coddled like children at the detriment of us all.
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