At UW Superior, the number of computers and accounts affected by the virus was limited.
Mark Anderson is the university's director of network and programming. He says the virus did no damage other than frustrate some users who had to delete hundreds of e-mails.
Aaron Mattison, who is charge of e-mail operations at UW La Crosse, says the campus' antivirus software has been catching the e-mail virus. It hasn't hurt any of its 2,000 computers or its 13,000 e-mail accounts.
Marquette University spokesman Ben Tracy says the e-mail virus hasn't had a widespread effect there. Campus computer users received instructions on how to install a patch to protect computers from viruses.