Tried that but there is NO thorough scan the only setting appear to be HIGH - Beginning to think I'm wasting my time with Avast
Relating to thorough, that question has been answered by mag:
If you want to change the sensitivity I think you may have to either create a custom scan ( on scan computer page) or tick the show special scans in user interface box in settings page - both seem to allow you to set sensitivity.
So click on the Custom Scan at the bottom of the page to create a scan, set the area, Scan; Sensitivity; Packers;
Personally I feel a Thorough scan (old 4.8 scan that doesn't readily convert to 5.0) is overkill, this is what I thought of the thorough scan in avast 4.8 (see below) and creating a custom scan to do the same I feel the same way. The Full System Scan is more than adequate as it essentially scans files that are at risk of infection and or present an immediate risk if infected, there is little point in scanning files that aren't at risk, .txt, .log, etc. etc.
Thorough is also by its design very thorough (it scans all files) and perhaps a little overkill for routine use, were a Standard scan without archives should be adequate. Archive (zip, rar, etc.) files are by their nature are inert, you need to extract the files and then you have to run them to be a threat. Long before that happens avast's Standard Shield should have scanned them and before an executable is run that is scanned.
I have only ever done a Through Scan with Archives once shortly after installation just to ensure a clean start state, but with XP for example avast will do a boot-time scan after installation if you select it, this I believe will be quicker and reasonably effective. Like everything in life things are a compromise.
If you still feel you want it, then create the custom scan (give it an name) and set it to do what you want and that is it done, use that when you want to run what you are calling a Thorough scan, you only have to create it once.
