All is fixed! The gooredfix tool did the trick and it only took a few seconds. For those who are curious about what gooredfix removed from my registry, I have pasted the gooredfix log below.
GooredFix by jpshortstuff (08.01.10.1)
Log created at 19:32 on 16/02/2010 (Compaq_Owner)
Firefox version 3.5.7 (en-US)
========== GooredScan ==========
Deleting "C:\Documents and Settings\Compaq_Owner\Application Data\Mozilla\Firefox\Profiles\y78zdvd4.default\extensions\{4e5a0bb3-35d9-42e6-8535-d939c7596103}" -> Success!
========== GooredLog ==========
C:\Program Files\Mozilla Firefox\extensions\
{972ce4c6-7e08-4474-a285-3208198ce6fd} [03:56 01/02/2006]
{CAFEEFAC-0016-0000-0011-ABCDEFFEDCBA} [03:40 02/08/2009]
C:\Documents and Settings\Compaq_Owner\Application Data\Mozilla\Firefox\Profiles\y78zdvd4.default\extensions\
[email protected] [07:01 09/02/2008]
{20a82645-c095-46ed-80e3-08825760534b} [01:12 04/09/2009]
{46551EC9-40F0-4e47-8E18-8E5CF550CFB8} [07:50 28/07/2009]
{635abd67-4fe9-1b23-4f01-e679fa7484c1} [08:29 16/11/2006]
{7affbfae-c4e2-4915-8c0f-00fa3ec610a1} [05:20 25/02/2008]
[HKEY_LOCAL_MACHINE\Software\Mozilla\Firefox\Extensions]
"
[email protected]"="C:\Program Files\Java\jre6\lib\deploy\jqs\ff" [03:39 02/08/2009]
"{20a82645-c095-46ed-80e3-08825760534b}"="c:\WINDOWS\Microsoft.NET\Framework\v3.5\Windows Presentation Foundation\DotNetAssistantExtension\" [10:12 22/08/2009]
-=E.O.F=-