Trying to speed up my computer, which programs can i uninstall?

i have Windows Vista (i know, it SUCKS) and an HP Pavilion Slimline s7700n PC. so i know that having more programs = having a slower computer, and i feel like most of these arent even necessary! but i dont want to install unless i am absolutely positive i dont use it. so heres a list of programs i have (and... show more i have Windows Vista (i know, it SUCKS) and an HP Pavilion Slimline s7700n PC.

so i know that having more programs = having a slower computer, and i feel like most of these arent even necessary! but i dont want to install unless i am absolutely positive i dont use it. so heres a list of programs i have (and their publisher), and the ones that i have no idea if i need them or not because i barely if ever use them or i just dont know what they are are marked with a *

Ad-Aware - Lavasoft
Adobe Flash Plater 10 Plugin - Adobe Systems Inc.
*Adobe Reader 7.0.8 - Adobe Systems Inc.
Adobe Shockwave Plater 11.5 - Adobe Systems Inc.
AIM 6
Apple Application Support - Apple Inc.
Apple Mobile Device Support - Apple Inc.
Apple Software Update - Apple Inc.
*Bonjour - Apple Inc.
Compatibility Pack for the 2007 Office System - Microsoft Corporation
*DivX - DivXNetworks, Inc.
*Enhanced Multimedia Keyboard Solution - HP
*Hardware Diagnostic Tools - PC-Doctor, Inc.
*HP Customer Experience Enhancements - HP
HP Driver Diagnostics - HP
HP Easy Set up: Core - HP
HP Easy Set up: Frontend - HP
*HP Imaging Device Functions 8.0 - HP
*HP OCR Software 8.0 - HP
*HP Photosmart.All-In-One Driver Software 8.0 .A - HP
*HP Photosmart Essential - HP
HP Solution Center 8.0 - HP
HP Total Care Advisor - HP
HP Update - HP
*HPSSupply - HP
InterActual Plater
iTunes - Apple Inc.
*J2SE Runtime Environment 5.0 Update 12 - Sun Microsystems, Inc.
*Java 6 Update 4 - Sun Microsystems, Inc.
*Java 6 Update 5 - Sun Microsystems, Inc.
Java 6 Update 15 - Sun Microsystems, Inc.
Logitech Legacy USB Camera Driver Package - Logitech Inc.
Logitech QuickCam - Logitech Inc.
Logitech QuickCam Driver Package - Logitech Inc.
Logitech Updater - Logitech Inc.
McAfee Security Scan - McAfee, Inc.
McAfee SecurityCenter - McAfee, Inc.
*Microsoft .NET Framework 3.5 SP1 - Microsoft
Microsoft Office OneNote 2007 - Microsoft
*Microsoft Visual C++ 2005 Redistributable - Microsoft
Microsoft Works - Microsoft
*Move Media Plater - Move Networks
Mozilla Firefox (3.5.7) - Mozilla
*MSXML 4.0 SP2 (KB927978) - Microsoft
*MSXML 4.0 SP2 (KB936181) - Microsoft
*MSXML 4.0 SP2 (KB941833) - Microsoft
*MSXML 4.0 SP2 (KB954430) - Microsoft
*MSXML 4.0 SP2 (KB973688) - Microsoft
My HP Games - WildTangent
*NVIDIA Drivers
ooVoo - ooVoo
PD Particles
*Player
*QuickTime - Apple Inc.
*Realtek High Definition Audio Driver - Realtek Semiconductor Corp.
*Roxio Creater Audio - Roxio
*Roxio Creator Basic V9 - Roxio
*Roxio Creator Copy - Roxio
*Roxio Creator Data - Roxio
*Roxio Creator EasyArchive - Roxio
*Roxio Creator Tools - Roxio
*Roxio Express Labeler 3 - Roxio
Skype 4.0 - Skype Technologies S.A.
*Soft Data Faxx Modem with SmartCP - Conexant Systems
Spybot - Search and Destroy - Safer Networking Limited
*Viewpoint Media Player

the programs i use most are AIM, Firefox, skype, iTunes, and Microsoft Office (word, powerpoint...)

there are a lot of repeats with the HP, Microsoft type ones. those i guess are hte ones im thinking abotu the most? Thankss for your help! 10 points guaranteed if you answer nicely ;)
Update: if you want to help me speed up my computer even more and answer my second question about computer PROCESSES, go HERE:
Update 2: http://answers.yahoo.com/question/index;_ylt=ArqIM2z_.yyFLSKTTYytE0vsy6IX;_ylv=3?qid=20100130090228AAyDJFl
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