If you never use Reaklplayer, then uninstall it.
See if it has its own uninstaller or use Revo Uninstaller or Add/Remove programs in Windows.
Then fix checked that entry if it still there.
For Lavasoft, turn it off in Services and see how system runs without it
Start -> Run - and type in 'services.msc' (without the quotations)
Find entries for Lavasoft or for Ad-aware, I'm not sure what they will be entered under
Click on the entry and stop (or may have Stop tab in lefthand column), and then set as disabled.
Then if you still cannot see firewall. Turn on in Safe Mode and do a Repair -
- Add/Remove Programs in Windows and scroll down to Repair. Take this option and finish with Restart.
btw you also have optrion to upgrade to new Beta build 5.0.492
http://forum.avast.com/index.php?topic=58183.0