Random Windef,WindSearch OFF and Win update issue..

[uxot]

Win-10 64-bit 1803

So..out of nowhere yesterday i got a red X in Wen Def..

"Threat service has stopped,Restart it now."

i click restart nothing happens i have to be in the page to restart to work..then its just the loading blue dots...tried to force start in services but then it gives me error:"windows could not start the windows defender service on local computer
Error 0x8007005: Access is denied."

Same for windows search (says index is off)
last thing is Windows Update issue:Window defender antivirus KB2267602 (Definition 1.275.1362.0)
It'sees to download and start installing but at 66% it gives this error:

Updates failed
Error 0x80070643
Tried Safemode:SCF,DSIM(or whatever the name),start-up repairs,regedit stuff etc...

Halp i just formatted a few days ago... and yes my Account is Admin.

 

[uxot]

Well finally found the issue: Permissions issues..i dont know how and why but:

regedit.exe -> "Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender" Right click permissions and makes sure system has full control if system is not there add it and put full control Also in advance makes sure owner is SYSTEM

Same for windows search and if it works dont change owner.