> Settings - Exclusions - Add the folder you compile MAME in. Easy peasy.
Who needs that kind of software anyway? I've lived nearly a decade without any kind of antivirus.
- Keep your system updated. - Do not enter to shady websites. - An Ad / Script blocker is obligatory. - Run unknown or untrusted software, games or websites on virtual machines or a second partition / hard drive without access to your main partition (the easier to reformat / revert back the better).
I'm temped to add: Use Linux as your main OS but so far Windows 7 is still working fine.