Ran MBAM and it didn't find anything, so it looks like everything is good now. Thanks again for all your help and patience, I really appreciate it.
One last question. Is it now safe to change passwords to my bank and different accounts on this computer, or should I still do it on another one?
Edit: Here's the log from MBAM.
Malwarebytes Anti-Malware (Trial) 1.70.0.1100
www.malwarebytes.org
Database version: v2013.03.25.10
Windows 7 Service Pack 1 x64 NTFS
Internet Explorer 10.0.9200.16521
home :: HOME-PC [administrator]
Protection: Enabled
3/25/2013 6:47:28 AM
mbam-log-2013-03-25 (06-47-28).txt
Scan type: Full scan (C:\|D:\|)
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 556225
Time elapsed: 2 hour(s), 38 minute(s), 14 second(s)
Memory Processes Detected: 0
(No malicious items detected)
Memory Modules Detected: 0
(No malicious items detected)
Registry Keys Detected: 0
(No malicious items detected)
Registry Values Detected: 0
(No malicious items detected)
Registry Data Items Detected: 0
(No malicious items detected)
Folders Detected: 0
(No malicious items detected)
Files Detected: 0
(No malicious items detected)
(end)