I just tried a bunch of driver version and NVidia made a new one 445.85 which is working again with the 1080Ti for me. Is it working for you too?
Edit: also in c:\users\youruser\appdata\local\nvidia\OptiXcache you can find all the cached kernels compiled by the drivers. If you clean it, it will force a recompilation of your denoising kernel and may help fix your issue. It also quickly becomes huge, so it’s good to delete it regularily anyway 