UPDATE: I installed the client from Steam, and it's working fine. I have no idea why. I didn't change anything on my PC. LOL...
Every time I install and run SWTOR (main website client download, not Steam), something very odd happens to my desktop. The case fans spool up, the whole PC bogs down, everything loads slowly, and I keep getting the little, spinning icon by my mouse pointer. This happens even after I shut the game down. There are no error messages or crashes. The only fix I've found is to uninstall and reboot the computer. My PC is a mid-range gaming rig from a couple of years ago, I have checked for viruses, and I don't have this problem with any of the other games I play, including MMOs. Any idea of what the issue might be? Why is SWTOR, specifically, causing this?
I don't even have to get in-game to have the issues start, just to the loading screen. I have tried changing the res to 1440 and 1080.
EDIT
System Specs:
Windows 10 64 bit
16 GB memory
I7 8700 3.2 GHz
GeForce GTX 1070
Thanks!