I'm aware that patchguard has been bypassed now, but I'm curious if pre-patchguard keyloggers could not be hidden by rootkits or by just being kernel level? I'm by nature a very paranoid person when it comes to web security (suffer from several types of OCD), so I am always worrying about the latest threads (longtime lurker). So far my security setup consists of Sandboxie (x64 so I don't rely on it completely), Avira Antivir (with webguard/guard turned off as I find it to be more of a hassle than it's worth), Winpatrol, Comodo firewall (defense+ turned off as it prevents many games from running on my system), SUPERantispyware, Malwarebytes, Spybot Search & Destroy, spywareblaster, hitman pro, and lastly microsoft security essentials. I am also planning on purchasing a 1 year prevx license at the end of the month. Anyways, so I'm wondering - if none of the apps I've said detect ANYTHING, are there any steps I could go about to be 100% sure that there is nothing on my system?