I have Trados Studio 2021 Freelance. I have attempted to install the SR2 service pack update several times but always see the above error message which just keeps reappearing, no matter how many times I reboot. Yesterday, in desperation, I uninstalled the whole of Trados, thinking it might work if I just downloaded the exe file and started again. Needless to say it didn't, and now I am still getting the same error message "Setup cannot continue because another installation requires a reboot. Would you like to reboot now?". Except now I'm not just missing the update - I don't have Trados at all.

Rebooting doesn't resolve the issue - it just puts me into a death loop of reboot, error message, reboot ad infinitum. I searched on the forum but couldn't see any other questions referencing this particular issue.