think i've been hacked

i setup my desktop and my laptop onto a 4 port wireless d-link router. model#=di-624 router. ok i just turned on the firewall that is in the router, no my mozilla acts like it doesnt have any cookies or a history file, everything i come here or my other forums it keeps asking for a username and password, even though last time i was here i said remember it. also everytime i go to post something on here (mozilla firefox newest beta version) or send a message using mozilla thunderbird 8.0 my avast anti-virus keeps saying there is a trojan on my machine, then i have to exist mozilla for it to stop. anybody know what is going on? thanks for the help.

eric

 

have you tried a virus scan and spyware scan. Also you have wep set up?

 

yes wep is at 128 (i think that is what you talking about). after i run virus scan all is well for about 2 days, then it happens again.

eric

 

The following is variety of tools and measures that might help.

Which one in particular? It is hard to guess!

First read this and follow some of the links:

Link to: Internet infestation -Or, how you are getting Internet “Junk” in and compromise your Computer/Network?

You can also try these programs.

Link to: CWShredder 1.59.1.

Link to: WinSockFix.

Link to: LSP-Fix.

If it does not help try to reset the TCP/IP Stack.

Link to: How to Reset Internet Protocol (TCP/IP) in Windows XP.

If finally it is working; Optimized the TCP/IP stack.
Link to: Optimizing & Measuring the "Speed" of Internet Connection.