Help a newbie with trojan virus

[c2020]

I really need some help.  I am new to avast and any antivirus for that matter so I don't know a lot or the lingo.  Recently i downloaded a free trial of PeoplePC dial up and that's when my nightmare began.  A couple of days later avast detected a virus.  I followed the prompts, sent it to the chest, but more kept popping up.  I felt like I was being attacked especially with the sound effects of a nuclear attack.  eventually i clicked on boot-time scan.  it found several viruses and i deleted them...or so i thought because they came back.  also a porn website keeps popping up and i think it's related to the virus.  when i'm offline i keep getting a prompt saying a network connection was requested and which internet do i want to use and it keeps popping up within seconds after i click cancel or open.  as soon as i log on i get a virus warning.  i tried deleting all internet temp files, cookies, and offline files.  i tried turning system restore off with xp home edition and then did a boot-time scan again, a few more viruses found and deleted, but to no avail.  what do i do?  am i doing something wrong?  as i type this the damn trojan horse warning is flashing on my screen.  here are a list of the viruses:

win32:trojano-2182[trj]
win32:dialer-407[trj]
win32:Crypt-p[trj]
win32:trojan-gen{UPX!}
win32:trojan-gen{vc}
win32:trojano-2201

pleas can somebody help?!

i almost forgot, when i try to move to chest or delete, it now gives me a system error saying it cannot find file. now what do i do?!

[FreewheelinFrank]

Hi c2020,

Please download these programs, install and update:

Ewido anti-Trojan http://www.ewido.net/en/
Ad-Aware: http://www.lavasoft.de/
Spybot Search & Destroy: http://www.safer-networking.org/en/download/

Check if Windows firewall is turned on. If you don't have XP SP2, see this link:

http://www.geocities.com/dontsurfinthenude/firetut.htm

Ensure avast! is up to date and then go off-line.

Run a boot time scan with avast!, then scan with the other programs in safe mode. (Tap F8 while booting.)

Reboot and ensure Windows Firewall is turned on. (If you don't have a third party firewall.)

With no firewall running, your computer will be infected again very quickly.

If your OS is not up to date, this will also allow your computer to be reinfected again very quickly, but it's important to make sure your computer is clean before updating so...

If you still experience problems, please run HijackThis and post a log file:

http://www.bleepingcomputer.com/forums/tutorial42.html