SWTOR Patch stuck at 0%

First make sure that swtor.exe and launcher.exe are in your firewall and anti-virus safe list.  This is to ensure they aren't blocking or deleting files.

If that doesn't work, do the following:

1. Run the launcher and log in.
2. Open the task manager on your computer (shortcut is Ctrl+Shift+Esc).
3. Select the Processes tab. On Windows 7, sort by image name and look for any starting with "br", they should be listed as belonging to Bitraider in the description column. In Windows 8.1, scroll down to the Background Processes and look for any Bitraider listings. Right click and end them. Don't worry if they come back.
4. Select the Services tab. In Windows 7, click on the button in the lower right corner that says Services. In 8.1, click the link at the bottom that says Open Services.
5. In the Services window, sort the list by the Name column, and look for BitRaider Mini-Support Service. Right click on it and select properties.
6. On the General tab, about halfway down, there should be a dropdown menu that says Startup type. Make sure it is set to "Automatic". Hit Apply the OK.
7. Close the Services window, the task manager, and the game launcher. Then restart the entire computer.
8. When computer has restarted, run the launcher and log in. The download process should now start properly.

Steps should be similar if your using Windows 10.  If this doesn't work, remove bit raider:

NOTE this is a complete download of the game again

right mouse click on game shortcut and select open file location

open the launcher.settings file in notepad and locate the below line and edit to the below

, "PatchingMode": "{ \"swtor\": \"SSN\" }"
, "bitraider_disable": true

SAVE the changes.
Delete the BitRaider, Movie and Asset folders then start the launcher.