UO Second Age

Trying to open UO and getting this error message "another copy of UO is already running" WTF. Never happened before, ever. And in the midst of a tower trade. FU. Thoughts?

Ctrl alt delete go to task manager and go to processes. Check for a uo that may be running that's not seen in the normal task manager tab. If running, end process

or hit alt enter to bring up the UO that is running you should see an icon up