Wierd... seems that you have trojan
. Perform computer scan. I dunno if telling names of mostly used online antyviruses is against the forum rules so if you do not know any PM me and i will advice you the best. Also some tool (or manual) control of registry entries and startup programs would be good to have (also no names
, most common tool starts with letter "H" ;P).
After scaning and finding virus the best option is changing the password imidiatly to the important aplications (bank accounts, Entropia, etc
).
@edit
Took a look on the rules again and only names that are forbiden are the names of the games and advertisment. So atyviruses are neither games and neither advertisment then:
Online antiviruses: Kaspersky, Bitdefender, Trendmicro Housecall (i advice this one mostly, because it can be run on Mozilla too, and after scaning it shows vulnerabilities in your system update).
The tool: HiJackThis (a bit complicated and better not delete any entries there if you are not sure if they are not necessary or malvare but there are few forums where you can paste the logs and people will be glad to help you
).