Have you checked if you have the common files of Bagle?
I have had the problem of my browsers being closed with another Bagle virus.
Go to System32 folder and delete ldr64.dll ("unlocker" may help if you can't) -you can send it to the chest first-, and also check this key in the registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\ldr64
(this key shouldn't exist).
Also, if you have a firewall you should check if your browser (or any application with internet access) is connecting to any strange URL (typical from this type of virus).