Nvsvc.exe je součást nVidia driveru (helper service). Píšou:
Zkusil bych v nouzáku odstranit ovladače grafiky a v normálním režimu nainstalovat znovu. Možná bych si pro driver "zašel" na web výrobce grafiky.NVIDIA Driver Helper Service - installed when you change from the WDM drivers to nVidia's latest versions but not requied. Extreme shutdown delays can be encountered with this service active, but no adverse side effects with it disabled. NOTE: If using drivers other than nVidia's, such as Asus, this service may have been renamed to reflect that