Hello Rachy,
1. Download Process Explorer and save it in C:\ folder (rename procexp.exe to explorer.exe before saving).
Download link:
http://live.sysinternals.com/procexp.exe2. Double-click to run renamed Process Explorer.
3. Select Antivirus System Pro process from the list. Should be sysguard.exe or AntiviruSystemPro.exe and press "Delete" button to end the process (note: can be [RANDOM CHARACTERS].exe too)
4. Close Process Explorer and download Spyware Doctor:
http://www.2-spyware.com/review-spyware-doctor.html5. Rename sdsetup.exe to explorer.exe and double-click to run it. Install, update and run Spyware Doctor. Then perform full computer scan and remove all found infections.