Thank you for providing ZERO system info ..as no one has any idea what your problem may be ??
where did you buy the game from ?
steam ?? uplay or is it a console version ???
if its a PC what hardware are you trying to run the game on ??
please see the ubisoft support troubleshooting page here https://support.ubi.com/en-GB/faqs/0...oubleshooting/
If you still have an issue, Please Contact Ubisoft Support Directly.
you can do so from that above LINKED page .. or here...to open a support ticket / case
https://support.ubi.com
please include your MS info and DX diag files to your support ticket
see this page on how to do that ...
https://support.ubi.com/en-GB/faqs/000026442/
they also have support options via facebook or Twitter in case you have those apps installed ..to check on updates to your support ticket
https://twitter.com/UbisoftSupport
https://www.facebook.com/UbisoftSupport