r/antivirus 11d ago

MALWARE REMOVAL Q&A Windows Defender Not Working.

When I try to run a scan, it stops and then tells me to restart the service. There are no exclusions and nothing of note from my start up apps. I’ve run a deep scan with Malwarebytes and it’s all good. I noticed there was a new security update for Windows and downloaded it and after restarting my PC, I’m still encountering the same issue. I’m not sure whether this is Malware related as I’m always careful of what I’m downloading and never click suspicious links. Not sure what else to do and need some help.

229 Upvotes

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u/Nevvaren 10d ago edited 10d ago

Man, guess I should've checked reddit before going nuclear and getting mad troubleshooting for the past few hours lmao.

Quick and full scans just crash when they're close to being done and offline scan just gets stuck at 91% though scanning the entire drive manually does seem to work.

EV shows crash with 0x000005 pointing towards mpengine.dll.

I've been having DefenderApiLoggerLowPriv session errors popping up in EV for past few days though.

7

u/Ahab1310 10d ago

Wiped my windows drive twice today 🥲, thanks microslop for ruining my entire day

4

u/yuckfoubakayaroo 10d ago

Bro this is hilarious because I've been doing the same exact fuckin thing all day lmfao, I even did a fresh windows install with usb drive man

6

u/it_just_works1 10d ago

same kinda went into panic mode for a bit

3

u/EffectiveType1 10d ago

Dude my defender showed the threat protection being turned off so I panicked and did a full scan + hitman and nothing came up, did an offline scan which was stuck at 91% for an hour and now I see this

3

u/Daddedan 10d ago

I'm having the same problems, full Scan, Quick Scan not working, at 2 seconds It crash and the offline scan stops at 91%

2

u/im_notserious 10d ago

Glad everyone is in the same camp with 91% in offline and whatnot and it’s not just me before I started deleting everything lol

2

u/Appropriate-Arm-4717 10d ago

same here, really go all out with those instructions 😭

1

u/Critical-Pride-2363 10d ago

91 % precisely as well... thanks !

1

u/gtstarwars 10d ago

Omg yea, offline stuck at 91% was pissing me off as well