This is a security feature for shared hospital PCs. Look for a "Remember me" checkbox during sign-in. On personal PCs, your session should persist for 30 days.
UpToDate does offer a free download. However, if you cannot afford a subscription: download uptodate for pc
If you don't need offline access, the easiest way to use UpToDate on a PC is via UpToDate Anywhere . This is a security feature for shared hospital PCs
: At least 2.0 GB of free hard drive space for the initial installation and content. download uptodate for pc