I keep having the exact same issue. This has been a problem since I moved to a new laptop with Windows 10 (never happened on Windows 7). Most recently occurred when I restarted my computer.
I've tried all of the options above and on other articles, but I can't even get to the software rendering option. That is, when I hold Ctrl while opening R Studio, nothing happens.
I presume it might have something to do with permissions, but what precisely? I've already made sure .\RStudio-Desktop has read/write permission, same with \Program Files\R Studio.