Install Plex to the C:\ drive of your computer. Installing to other drives can sometimes cause problems.
- Reboot your PC.
- Fully remove existing versions of Plex, including registry keys and Plex data folder.
See Uninstall Plex Media Server. - Reboot your PC.
- Re-download Plex Media Server from https://www.plex.tv/media-server-downloads/#plex-media-server.
- Install Plex Media Server on the C:\ drive of your computer.
If desired, you can relocate the Plex Data Folder, where Plex stores its database and other information, to another local drive. Do not move the Plex data folder to a network drive.
See [HowTo] An extended guide on how to move the Plex data folder on Windows