When you deleted the Documents folder, did you have cloud support disabled? As long as you were prompted to create a new profile after installing the game again, it shouldn't have carried anything over.
That should eliminate issues in the My Documents folder, and the clean reinstall should have fix any problems in the game data (these symptoms typically caused by a data mismatch)...
Try doing a clean boot and then test the game. Click Start, or hit WinKey-R, type in msconfig and hit enter; in the General tab, click Selective Startup, uncheck Load startup items (if required) and leave Load system services and Use original boot configuration options checked. Next, click on the Services tab, check the box to Hide all Microsoft services, then click the Disable All button (maybe make a note of which are currently enabled/disabled), then click OK and reboot the computer.
Run msconfig again to switch back to the normal boot configuration.
Try creating a new Windows administrator user account (preferably with the Documents folder on a different drive, if available, and the user name not including any special characters, etc), switch to that account and try starting the game from there, directly from the executable to test.
Try resetting your network adapters:
- click Start (or Search in Win 10), type cmd into the search box, right click Command Prompt and select run as administrator.
- type the following command and hit Enter
netsh winsock reset
- when that is done, there should be a message 'Winsock reset completed successfully'
- type exit and hit Enter, then reboot your computer.
For more details, see:
https://iihelp.iinet.net.au/Resetting_Network_Adapter_(Winsock_Reset)
