I think the installation problems have to do with the riched20.dll problems. My free memory space on the computer fluctuates as well.
Please help. If more information is needed I will fill in, but I don't really understand computers.
Oh, and I use two firewalls.. actually I deleted Norton anitivrus components mostly, but I still have the personal firewall and I have Zonelabs firewall and AVG antivirus. I tried to delete Norton personal firewall (cuz I thought it might help), and I downloaded a Removal tool but I can't install the tool also due to a riched20.dll error so I ahve both on my computer right now.
I think I might have nimda virus but I tried housecall and AVG virus scan and they didn't detect anything.
Thanks a lot