We have 800 VDI sessions. We are required to scan the VDI workstations but our Virus scan vendor is killing us on memory use. Anyone using a vendor that works?

What was the first year of the computer virus on a US network? What was the name of it? where did it come from? Did it come over the Internet? Or did it come from a diskette?

We have about 500 computers. About a week ago we noticed a nasty virus on our network. We have been trying to get it cleaned up. Any ideas on how really knock this thing out?