To sum up, then: so long as I update my antivirus the moment I log on (before doing any web surfing), my chance of getting hacked is extremely low?
It seems pretty obvious that you are very worried about this whole logging-on and update issue. That's fine. But if I was in your shoes, I'd just try to relax a little. Obviously, you need to be online to update your Win Defender. Why not open your first tab on this forum....you aint gonna get a virus on BC! Then just go to Windows Defender via your Windows search box and do your updates.
After this, if you are still concerned you may have contracted malware in the meantime (unlikely - highly unlikely!) do a full Defender scan (once updated) and maybe even run a scanner like HitmanPro or Zemana which you can download from the Download forum on this site. These scanners offer a free trial for 30 days with the option to upgrade and are fantastic tools in searching for and eliminating malware....and bringing about peace-of-mind, too!
Edited by robby501, 04 May 2016 - 04:14 PM.
Im a rookie and purely recreational pc user. Im utterly obsessed with security (even though I consider myself a safe and law-abiding internet user!) and run a combo of the following freeware security suites.....
Regular scans with Malwarebytes, AdwCleaner, JRT, HitmanPro