The Microsoft Internet Explorer web browser is vulnerable to attack as described at https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200001. There is currently not a fix, and attacks are currently leveraging this vulnerability. We recommend not using Internet Explorer while this issue remains unaddressed.
Chrome and Firefox are available in the Software Center for campus managed PCs: https://support.csuchico.edu/TDClient/1984/Portal/KB/ArticleDet?ID=11735
Safari is installed on all Macs.