I thought it was an option when you launch the software?
- The Windows Defender Offline creates an ISO file called MSSS_Media.iso and saves it to: %ALLUSERSPROFILE%\Microsoft\Windows Defender Offline
livadi, you just cannot believe how familiar your situation sounds to me...However I tried to install over than 10 different antivurus programs... What I did to solve my problem is to copy all valuable information to a couple of flashs, format my PC completely and re-install Windows...fortunately it worked...Hope i was helpful...
If the clean machine has an AV, then it should not infect it.