WIndows Defender not Launching

[GeneralMercer]

Hey guys,please help.I will tel it to you form the start.Windows defenders proceess Name -MSMPENG.exe was taking 100% usage of cpu so i tried disabling Widnows defender anbdd 100s of way until i deleted its folder.Now whenever i try download an antivirus and install it there is an error (with bitdefender a file was missing,with Panda antivirus it didnt mention,and many others).Now i am trying to enable windows defender from settings,it tells me to enable i have to press the restart button below it and then this happens when i press it see screenshot restart now ,but its wriiten "unexpected error ''.I tried searchign for windows updates ,but there arent any.Please help.

 

[rgd1101]

You deleted windows defender and try to turn it back on?

try do a
sfc /scannow
in a command prompt