Pop Up Ads & Virus Infection?
I have a Pentium II PC running Windows 98, with cable modem (Earthlink), Norton Internet Security and Norton Antivirus (2002). Recently, I noticed a lot of pop up ads (even when my web browser IE4 is not open) from various sites even though I have the NIS Ad blocker enabled and I also have Earthlink's popup ad blocker. I also noticed that applications were being installed in my c:\program files directory without any action on my part. Some perpetrators included, Memory Meter.com, Clock-sync.com, save.com, huntfly.com, etc. The strange thing is that although I delete these applications as soon as I notice them, they are re-installed sometimes within minutes of erasing them! I have run a full system NAV scan with no viruses found. I know something is happening in my PC since I cannot defrag my hard drive or complete a scan disk or Norton disk doctor due to some application running in memory (even after disabling NAV and NIS). Any suggestions? 
