I need some help here. Not sure if this is the correct forum. I run XP home,avast! antivirus, Zone alarm (free), Spyware Doctor and a-Squared Free anti-malware. Never had a security problem since 1996 and most ports were stealth, others closed. I moved from Hong Kong last month (having used PCCW broadband in HK) to Bangkok where I am living long-term in a hotel using "MagiNet", through cable. As soon as I plugged in I was infected by "Worm.VBS.Solow.a". It appears to do nothing in my system and it is readily deleted. But each time I use the net it reappears. Virtually all my ports are now "closed", not stealth, and ports 0,21,23,80 are wide open. I cannot "re-stealth" them. ZA firewall is on High, Windows security is on High and all my security programs are up to date but somehow this worm gets in. Is this a threat? How can I stealth my system again. Grateful for advice.

Operating System:Windows XP Home Edition
Product Name:ZoneAlarm (Free)