if its a trojan horse, you can stop it from using your internet connection by installing a firewall like ZoneAlarm, firewall will help you to limit your internet access so that hackers will not be able to take over your already vulnerable PC
to remove the infectants... its best to start your PC in Safe Mode, for older Windows OS, hold F8 while booting, more recent OS hold CTRL instead... cos loading in Safe Mode should prevent some of them from loading together with your OS...
also, remember to disable System Restore before you do a virus scan... cos any malware that is caught and removed by your antivirus prog might be accidentally backed up by System Restore
as for the possibility of which malware infected your PC, this is a possible culprit:
http://www.trendmicro.com/vinfo/viru...ROJ_DLOADER.SU
since Trend Micro's database has the closest match to the malware you stated ("zgame1[2].exe"), i suggest you try using Trend Micro's online virus scanner Housecall
http://www.sysinternals.com/Utilitie...sExplorer.html
Process Explorer is a good utility that you can use to monitor all running processes, programs running in the background... and the threads and DLLs associated with them... this will allow you to find out the names of the malwares that are running and any processes they're involved... then use Task Manager to End Task them!
http://www.sysinternals.com/Utilities/PsKill.html
if you know how to use command lines like the DOS environment, you can use PsKill to force terminate a running process... basically it means you can kill any program that is running using PsKill, as long as you know its name... refer to the site for details on how to use PsKill... if can use it, you can kill the trojan! then delete it!
also, you should have a most recent full system backup ready at hand... in case you need to perform a non-destructive restore... your personal files should be intact as when you last did the backup
also, if other antivirus progs arent able to detect and remove the malware... try NOD32
www.eset.com
its very fast, and its the best antivirus solution in the world... its has won 33 VB100 awards (Virus Bulletin is an official award given to outstanding antivirus programs for being able to detect almost every virus and malware in existance...
www.virusbtn.com/vb100/about/index.xml)