Install problems after Windows 1803 Update

I´m using Cubase 9,5,21 and UR44. Cannot start Cubase after 1803 update. It gets stuck when “Inizilizing Steinberg UR44 Extension”. Windows installer automatically starts, but it wont initiate - gets stug during “preparing to install”.
I have tried to completely remove UR44 tools, and reinstall the latest version, but still same problem. I have also tried to update firm ware, but that wont start (gets stuck during preparing to install).
Anyone who knows how to get around this?
Thanks in advance!