You can clean the Shader Cache ...
Disable Shader Cache globally in Nvidia Control Panel, reboot, and delete the Shader Cache folders from both %TEMP% and C:\Windows\Temp. Then re-enable Shader Cache and reboot again.
reviving this old thread because tonight i actually had this problem come back... cleaning the shader cache worked again, first time.
It was taking over a minute or two to get into a game and at the end of a game, and after 3 games like that i'd lost my patience with it.
So i did the following:
launched nvidia control panel
clicked 'manage 3d settings'
changed 'Shader Cache Setting to 'Off'
clicked Apply
*REBOOTED PC*
located and deleted: C:\Users\*****\AppData\Local\Temp\NVIDIA Corporation\NV_Cache folder & its contents
located and deleted C:\Windows\temp\NV_Cache folder and its contents
launched nvidia control panel
clicked 'manage 3d settings'
changed 'Shader Cache Setting to 'ON'
clicked Apply
*REBOOTED PC*
Tested ME:A in multiplayer, and the building shaders zipped past like never before.
*** CURED ***
Posting this here in case anyone else has just hit this issue on pc.. and perhaps wants a fix that seems to work.
