I know there are already several other topics regarding the selection tool being slow. I’m posting a fix here since some of the other topics are quite long and it’s difficult to get to the pertinent info.
Seriously this is my number one support request for my Building Creator Extension.
I’ve found that trying to update the graphics card driver from the device manage incorrectly states that the best driver is being used.
Instead you should download the latest driver from the graphics card manufacturer website, and run the installer.