My computer is full of viruses and something called trojan horses?

Im like 14 and dont know about all these viruses it says someones trying to infect my computer I dont know who it is and how they do it last week I got several over 200 emails talkin about president bush iraq osama binladin some prince and terrorist attacks now someone has infected my computer with several viruses trojan horses and sent sexual pictures how do they do this how do i get rid of these attacks and oh yeah I have a antivirus called avast but I need somethind free and stronger

My computer is full of viruses and something called trojan horses?antivirus programs

You could download AVG antivirus and AVG antispyware from www.download.com these are very good products and are free. I would also download Spybot and Spywareblaster and make sure you dont open any more emails unless you know who they are from just delete them straight away. These products should help alot!

Good luck

My computer is full of viruses and something called trojan horses?computer protection

Your computer is beyond repair.Anyway It will take less time and it's the safest to format the drive and reinstall everything (backup your data first) than to try to clean this mess.

AGV is free and descent antivirus but you also need a firewall and an antispyware. Internet nowadays is a battlefield.
http://housecall.trendmicro.com/ here is a great free online scanner that will remove them. good luck and dont open those emails. they are the sorce of the infection.
Try free online remover http://www.SecureMyWindows.com
Trojan horses attack your computer through the backdoor. Scan with Trend Micro. It'll remove them all. Also, turn on your firewall, and get full protection pronto. Don't wait another minute. Viruses will destroy your computer.
Easy. Just reformat your computer. Even though you are going to lose everything from your computer (files, programs, music, videos..etc) why bother installing antiviruses if your computer is seriously infected. Get your Windows XP CD or recovery CDs that came with your computer and reformat. If you don't know what reformat is, I suggest you to read the Windows XP Manual or the Computer manual.