win 7 64bit pro can not install driver

Xenserver 7.0 installs the grid driver normally, nvidia-smi displays normally
But I installed a matching version of win 7 64bit windows driver can not be installed
Display failure
I tried to install using the upgrade driver in Device Manager.
After the VM is restarted, the VGPU graphics card in the vm is still not installed.
Right click on the desktop and the nvidia control panel icon is not displayed properly.