Start – Control Panel – Administrative Tools – Services. Find and double-click “Windows Image Acquisition (WIA)”. You need to check on “Startup type” and “Service status”. They should be “Automatic” and “Started” respectively.
If they aren’t, make them so, and reboot.
If they are, I would stop the service, then change start-up type to Disabled, then reboot; then change start-up type to Automatic, and reboot again.
Tell us what you found, what you did, and what difference (if any) it made!
Good luck.
Andy