Update!
General computer knowledge: Intermediate
Level of security risk: Medium
Operating system: Windows XP SP3
OS architecture: 32 bit
Non-admin account: No
Real-time protection: avast! 7 (free edition), Privatefirewall, Sandboxie
On-demand scanners: Malwarebytes (free), Hitman Pro
Browser(s): Firefox (has NoScript, WOT, Adblock Plus, Ghostery), Google Chrome (has WOT, Adblock Plus)
P.S.: Yes, I have Java. And I keep forgetting to put Sandboxie in my setup.