Receive the following message in a popup dialog: "Choose R Installation. RStudio requires an existing installation of R. Please select the version of R to use. [X] Choose a specific version of R [...]" The 64-bit version is the only one that shows up, and it's selected by default, with no option to select any other version.
Click "OK"
Receive the following message in a popup: "Error Loading R. An error occurred while attempting to load the selected version of R. Please select a different R installation."
Found this resource, which seems to address the same problem.
Attempt to install the daily build by double-clicking the .exe file. Receive a popup asking for Admin password. Enter Admin password.
Get a popup that "RStudio is currently running, please close it..."
Close all open RStudio windows.
Repeat steps 7-8. Same message. No RStudio windows seem to be open.
Open Task Manager by right-clicking on the Start button and then selecting Task Manager.
Select RStudio and choose "End Task". Close Task Manager.
Repeat step 7-8. Same message. What???
There's some suggestion in the above-mentioned issue that installing a new version of R could help. So I installed 4.2.3. Put it into Users/Kaija/LocalPrograms or something like that. Setup wizard worked fine.
Tried again to open the new RStudio .exe file--same problem as before.