Hi,
Rstudio consistently opens with a blank screen on my Mac (this may not help windows, sorry) but one way I have found to solve this is:
- Open Rstudio
- If you can, go to the Rstudio>Services tab and open an activity monitor (again, this may only be a Mac feature, sorry)
This seems to re-jig things on my device, and Rstudio opens shortly after. Good luck!