Windows 8.1 RTM added 10GB of Nvidia files to DriverStore.
My Windows 8.1 Pro x64 RTM clean install used about 16 to 17 GB of disk space. After installing Nvidia GeForce 326.01 drivers via Windows Update, the disk usage went up 10 GB!
Checking the contents of C:\Windows\System32\DriverStore\FileRepository folder found 37 nv* folders (totaling 10GB) containing Nvidia drivers, all with a creation date similar to date & time of Nvidia GeForce 326.01 driver installation through Windows Update. Probably explains why the Windows Update progress bar lingered at 0% for several minutes when the Nvidia drivers were being installed.
This didn't happen on the same computer with Nvidia GeForce drivers installation via Windows Update on Windows 8 Pro x64 RTM.
I noticed a similar inquiry posted on the Microsoft Community forums but no significant replies.
Has anyone experienced this? I'm inclined to just delete the folders.