If I were you..
..I'd get an anti-virus program installed and updated on my PC for use over the next few days. Making sure your PC is "Y2K compliant" is all well and good, but that won't matter much if a Y2K-triggered virus (and rumor has it there are lots of 'em) wipes out your computer's boot drive. Personally, I don't like anti-virus programs because they tend to sap performance, but it's time to bite the bullet and download a 30-day demo of McAfee, Norton, or whatever and run it for a while.
While I'm lecturing, I might as well mention firewalls. Script kiddies worldwide are planning their own brand of festivities for Y2K, and you'll want some basic protection. If you don't have a firewall at work, well, I can't help you. However, if you're using an "always on" 'net connection at home like DSL or a cable modem, get a hold of something that provides basic protection for your home LAN (a NAT program like Sygate, or heck, a Linux ipmasq box). You can also get a personal firewall (like AtGuard) for your individual PC. Many of these products offer 30-day downloadable trials, and hey, you may learn something worthwhile about networks in setting it up.