Windows 8.1 64 DEFENDER TURNS OFF DURING SCAN ! shut shuts turning turned

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xexe2

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Windows 8.1 64
16 GB RAM (2 sticks vengeance ddr3)
Intel i7-4790K (Not overclocked and won't be)
Motherboard GIGABYTE Z97-HD3 LGA 1150 rev 2.0
GeForce GTX 1050ti not overclocked
PSU: EVGA supernova 650 Watt G2 80 plus Gold. I'd love to smash this computer over someone's head but the computer is too important to me.


Starting last night, towards end of a scan Defender turned itself off and goes to all red borders. While tinkering with things today I am using Quick scan to test and Defender turns off towards the end of a quick scan in about 30 seconds. If I do full scan today (which normally takes about 30 mins) it turns Off in about 30 seconds.


I click Turn Defender back On and it takes about 30 seconds and does turn back on but repeats problem when I scan.


I have spybot and defender installed. never had an issue with them for years.


About 8 weeks ago I downloaded malwarebytes first time ever. Scans showed no threats and I recently uninstalled it about a week ago. I uninstalled it in control panel and it said sucessful. The problem I'm facing usually indicates conflict of multiple AV progs but I uninstalled malwarebytes fully in control panel.


In Action Center, my security tab = Defender IS On, some mention it might not be selected On after using other AV progs but it is.

I ran sfc /scannow. See black image.

I reinstalled malwarebytes just today in order to re-uninstall it. I ran a scan first which was clean, and then uninstalled it but still problem.

I defragged SSD drive but no help.

I ran Disk Cleanup in control panel Administrative tools. See pictures. I don't know if selecting and deleting those will fix or worsen computer.


I de-selected in Defender to Scan Archive files but it doesn't fix.
"...MSE is having problems with large compressed/zipped archive files due to the fact that MSE needs to open these in memory to scan them..."
Windows defender turning itself off during a full scan

I think there IS something wrong with the RAM/Memory because I have a separate problem where the PC has been giving bluescreen every 2 months or so with error codes that suggests RAM problem. And also not waking from sleep happens quite often: still unsolved: very much willing to just buy new memory if that's the likely the cause:
RAM changed slots fixed reboot loop, but...


I did this:
In Run dialog box, type 'services.msc' and hit enter. In Services, search for 'Security Center'. Right click on 'Security Center' and click on 'Restart'.
And I also restarted the PC before trying to scan again but it didn't fix it.

I'm ready to snap.


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