Computer novice lost and unsure of how to use guides

Hello, I am trying to help my fiance remove the trojans on his computer. He did not have up-to-date anti-virus (and in fact had more than one kind of out of date antivirus) and had left over "tools" from a couple of years ago when he paid someone to fix his computer. He wanted to download SP2 but Microsoft wouldn't let it download. He was also having alot of issues with extremely slow computer and browser redirection to crazy sites and also extreme pop-ups. So I looked up information on the net after talking to my IT guy at work who, when I asked him where to find a good repair shop, assured me I could download free tools and programs and resolve the issues myself. After reading some forums I removed Norton because my fiance wasn't using it and didn't want to have to pay for antivirus IF there was an equally good free one and I also removed AntiVir because it was missing too many files and wouldn't run correctly. I decided that it was better not to use Norton or McAfee since I heard they bogged down system resources so much compared to other programs. I reinstalled AntiVir and added Ad-Aware SE, Threatfire, Spybot Search and Destroy, CCleaner Slim, and left HiJackThis since I wasn't sure if I should get rid of it or not. I ran CCleaner Slim, Threatfire, Ad-Aware and Spy-bot and then I ran Advanced Windows Cleaner and I had it make a restore point. I allowed it to make the changes it recommended since I had no clue how to tell what was good or bad in it. After that I could not get any Desktop Icons - only had background picture, however I could do Control-Alt-Del and get task manager to go to normal desktop choices. Since I don't know much about PC troubleshooting and repair I decided to restore the computer back to the restore point AWC made for me in case the changes AWC made were in cahoots with any possible malware on the computer. I ran AntiVir and got several hits on trojans and possible Heur/malware. I read the how-tos (there are many!) but maybe I have information overload now from reading so much - It sounds like going through the guides (there are so many) that I should uninstall some of the new programs and change them for others? I do not know how to do the stuff in safe mode without a walkthrough and I guess I am wondering if anyone could look at my AntiVir log of issues and tell me where to go from here. Please, Please help me - I really want to learn to do this myself and not have to rely on strangers to DO everything for me and then I still don't know. I intend on adding a firewall and a few more items as well after I get the malware off and get the computer cleaned up and registry cleaned up etc. Please, please could you guide me from where I am:cry?????? I know I have TR/Dldr.Apropo.C.6 - TR/Pahador.F - DR/Lop.BO.7 - I have 3 system files that won't open and 3 possible Heur/malware - I put them in quarantine. I do not know where to go from here. I have the log if that would help. We are running Windows XP home Edition SP1 (5.1.2600)

An Ever Grateful Purple Princess Thanks YOU in advance for your help!

ThePurplePrincess4u

 

Thanks for your reply - just in case I can't get back to the post during any of these procedures and since my printer died of old age recently ( so no printing) - I did paste all the "How to's" to my yahoo email and emailed them to myself because I can access my Yahoo mail through my cell - may take a bit longer, but at least I have a "how to" back up I am sure it will take me a few days since I work long hours, however at least I have a place to get started and at least I have an opportunity to learn - whether it is what to do or what not to do! Thank you so much and I will repost as soon as I get these completed.

An ever grateful PurplePrincess!!!