R studio not responding

 Before uninstalling your R and RStudio, you have to make sure that you have to delete every sub-folder that falls under the following folders called R, RStudio, or RStudio-Desktop. Then uninstall R and RStudio and then again install your RStudio and R. I think that will work for you.

R is not responding to your request to interrupt processing so to stop the current operation you may need to terminate R entirely. Terminating R will cause your R session to immediately abort. Active computations will be interrupted and unsaved source file changes and workspace objects will be discarded.