Hmm, interesting you should mention the strange behavior Alexei23. I am currently using the same setup you previously had (CIS Firewall and Avira AV), and I too am having some strange behaviors. For example, on this bootup, my taskbar is gray, not blue. Some startup programs won't load at all, others load but don't display a tray icon. Sometimes I will double-click a program icon and nothing happens at all. Then if I open Task Manager, it shows multiple instances of the unresponsive program running. I am going to make a new post for help on some of these issues, but I just wanted to mention that this strange behavior has only ever occurred with the above firewall/AV combo. I'm sure some of it is me just not knowing what the heck I'm doing yet!