Also - if this is the Steam version of 3dMark - you need to go and physically remove the 3dMark folder from the steamapps/common folder, as merely deleting the "local caches" sometimes leaves behind several files that can break the software - verifying local content does not fix the corrupt/left behind files either.
So once you "remove local cache" of 3dMark - then go delete the folder from steamapps/common, and then reinstall 3dMark, and allow it to redownload Time Spy.