1) ran SPYBOT S & D which is already installed, but was afraid to update via the internet due to existing infection
2) ran AVG scan with most recent updates imported from this computer
3) it seems that SP2 is already installed, but not sure (I'm a novice)
message continues to appear from AVG every few minutes regarding the following file being infected with the collected.5.l trojan horse:
c:\documents and settings\[user name]\msdirectx.sys
keep deleting it and after a minute or so it comes back
Thanks in advance for your help.