OK. Just installed 5.0.1144 Free Edition on one machine. Since the definitions are updated to most current during install, I'll check to see how things are after the next definition update. Also going to try the portable version on another machine. ----- EDIT: New desktop version updates just fine. Portable version works as well. Thanks for your help.
Just a heads up, the free edition is not working. The difinitions on 3 of my desktops show 2/8/12. I tried yesterday and today to update the definitions, but it keeps telling me they are up to date. I found the definition download page and installed the most current version manually. (2/10/12 8230/6042). I'll check again tomorrow, hopefully things will be sorted out.