engine initialization failure

Help! I used to run comodo antivirus without problems but suddenly now i get 2 two error message after starting the full system scan.
message 1: “Engine Initialization Failed”
message 2: “CavSn.exe” “Unhandled Exception. Expcode:0xc0000005 ExpFlags:0 ExpAddress:0x00411e2c please report”

I already uninstalled and reinstalled Comodo but I get the same result :frowning:
Any help out there??
thx Steevo99