I've moved your post to our VirusScan for Enterprise area for better attention by an expert.
Keyloggers are supposed to be detected and removed by the antispyware part of VirusScan. This is a separate module available for VSE 8.5 and 8.7 and integrated feature in VSE 8.8. If such a feature/module is installed, you'll see it displayed in the VirusScan About screen.
You need to enable unwanted programs detection in VirusScan and enable unwanted program types to get detected in the Unwanted Programs policy.