i have a problem with my avast software. I have contracted 2 trojan horses. trojan Dyfuca and Win32:trojano-803. I was infected with the 803 virus from a website that i typed in wrong. It was www.o**ir.com. Don't go there!!!!!!! So avast was running and it caught it. The recommended action was to move to chest. I clicked on the move to chest button and it started to move it. I then got an error message stating that the file was too big to move. This is the file. "C:\Window\AllUsers\ApplicationData\AOL\Storage\cache.db". So then i hit delete and it proceeded with the scan. The next day it came back, along with the VBS:REDLOF virus. The same action for the trojan was recommended and the same thing happened. The vbs virus i moved to the chest and then deleted. The vbs virus had shown up twice but now seems to be gone. The trojan horse I have contracted 8 times in four days and now have further problems because of it. Now last night when I attempted to run avast, there came an error message saying that "usiSkins" were unreachable and that the operation had failed. I attempted to delete the avast software and reinstall it, only to the same result. So, I tried downloading the avg software, and it found the trojan dyfuca, but the program shut itself down before I could delete it. I am still infected obviously, because now when I try to run avast, it gives me this error message. "A required .DLL file, ASHBASE.DLL, was not found. It pops up in a window called error starting program. I click ok and it goes back to the normal desktop.
My computer runs on a windows 98 system. I have avast antivirus, spybot search and destroy, ad-aware se personal, and a zone alarm firewall. What do I do to fix this problem and how do I keep it from coming back?