ormax3: I second the use of builtin Windows Defender, and just disable the "real-time protection" which constantly scans EXEs and such. Then you can add entire folder to "exclusion list" that way if there are false-positives it won't quarantine them behind your back.
You don't need to disable "real-time protection" to achieve that, and I seriously advise you don't. Just add files or folders to your exclusion list.
timppu: I don't remember, but can you disable it completely?
Also, is MS still providing updates for it in Windows 7, and for how long? Considering MS doesn't support Windows 7 otherwise anymore, right?
Yes they are still providing updates. Possibly the same updates that newer versions of Windows get, but as has been said, not an update to the program itself, just the database.
You can of course disable "real-time protection" but I don't really recommend you do that. Just better to set your quarantine rules and just make exemptions for specific folders and or files. In addition to that, just check the History tab now and then to see if anything has been quarantined that you did not cater for (restore and exclude if so).
P.S. Unless I know the file that has been quarantined, I check it online with VirusTotal before doing any restore and exclude.