Comodo Firewall + windows color scheme


I’ve got a problem with CF. Every time i start my windows xp sp3 my color scheme is being changed from silver to the default one - blue. The even more curious thing is that the only thing that rly changes is title bar. Fonts are untouched. Why does this happen and how to fix this issue? I have to change my theme every time I start my work.

I’m using the latest Comodo Firewall, free version of Avast antivirus, windows xp pro sp3 and i guess it’s everything that could be important to say here. Everything is up to date.

I’ve also checked if anything connected with system startup is blocked but I haven’t found any firewall’s actions.