As the firewall settings have been changed you may well have malware on your system. To counteract this I would like you to run 2 programmes in the following order then post the results :
Download ComboFix from Here or Here to your Desktop.
[*]Double click combofix.exe and follow the prompts.
[*]When finished, it shall produce a log for you. Post that log and a HiJackthis log in your next reply
Note: Do not mouseclick combofix’s window while its running. That may cause it to stall
Download & Run HijackThis.exe
[*]Download HJTInstall.exe to your Desktop.
[*]Doubleclick HJTInstall.exe to install it.
[*]By default it will install to C:\Program Files\Trend Micro\HijackThis .
[*]Click on Install.
[*]It will create a HijackThis icon on the desktop.
[*]Once installed, it will launch Hijackthis.
[*]Click on the Do a system scan and save a logfile button. It will scan and the log should open in notepad.
[*]Copy/Paste the log to your next reply please.
Don’t use the Analyse This button, its findings are dangerous if misinterpreted.
Don’t have Hijackthis fix anything yet. Most of what it finds will be harmless or even required.