I upgraded to iTunes 10.4 last night and this morning I can't open itunes

Question

I installed itunes 10.4 using the apple software update program on my laptop running windows vista. after it installed I continued to use iTunes to listen to music but had not restarted my computer. So when I started my computer this morning and launched iTunes nothing happens. So I uninstalled it thinking something might have been messed up in the restart and reinstalled it and still iTunes won't start. Anybody else having this issue?
<Title Edited by Host>

Answer 1

This is the result after doing the Full Scan:
Malwarebytes' Anti-Malware 1.51.1.1800
www.malwarebytes.org
Database version: 7435
Windows 6.0.6000
Internet Explorer 7.0.6000.16982
8/11/2011 12:49:54 PM
mbam-log-2011-08-11 (12-49-54).txt
Scan type: Full scan (C:\|)
Objects scanned: 442205
Time elapsed: 1 hour(s), 25 minute(s), 13 second(s)
Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0
Memory Processes Infected:
(No malicious items detected)
Memory Modules Infected:
(No malicious items detected)
Registry Keys Infected:
(No malicious items detected)
Registry Values Infected:
(No malicious items detected)
Registry Data Items Infected:
(No malicious items detected)
Folders Infected:
(No malicious items detected)
Files Infected:
(No malicious items detected)