McAfee Plus

You can uninstall Crapafee in the add/remove section of the control panel and frankly I would remove it if were me as it's not a very good A/V. You mentioned you're running AVG also which could be part of your problem as running 2 antivirus programs tend to bog down the pc and confuse both of them. What I run on my pcs are Microsoft Security Essentials for the Antivirus and Malware Bytes for everything else and of course the built in firewall for Windows 7. Security Essentials is free and there is a free version of MB also but I upgraded to the paid version for the extra real time protection. I'm not that big on AVG anymore because of the false positives it returns and how much malware it misses. The combination of Essentials and Malware Bytes has been all I needed and I haven't had a virus now in several years.

Now Java, Air, and Macromedia Flash should ALWAYS be updated as soon as you get the update notices, especially Java. Java updates usually plug holes that hackers use to control your computers and turn into bot nets to reek havoc on all sorts of websites from government to large private company sites. Over the last 2 weeks alone there have been a few cases of Java exploits in the wild and therefore really need to be addressed ASAP. Adobe Air and Flash should always be updated too for the same reasons but there are fewer current cases of attacks involving those two. Still it's better to safe than sorry.

Stay tuned because I'm working on a story on one of the newest exploits out there. This one is nasty and very serious as it encrypts the files on your hard drive making the drive useless unless you pay the exploiters a ransom starting at 300 dollars and up with no guarantee they will release your drive after payment. The kicker is antivirus usually doesn't detect it and once you have it you're toast as decrypting without the encryption code is very hit and miss.