Hey pauls1958, welcome to the forums!
This is quite a generic crash error, so could be caused by a number of issues. Please try verifying your files:
1. In Uplay, click on Games tab at the top of the window
2. On the next screen, hover over the game tile. This will make a little arrow appear at the bottom right of the tile
3. Click on this arrow to make a drop-down menu appear, then click on Verify files
Please also disable your background applications (for testing purposes):
1. Close all open programs and reboot your PC.
2. Press the Windows and R keys simultaneously.
3. Type msconfig into the box and press Enter.
4. Choose Selective startup.
5. Uncheck Load startup items.
6. Reboot your system.
If the crash still occurs, please go through the rest of this guide and get back to us if you need any further assistance!![]()