This link describes some solutions there is an auto fix button but since I know nothing of the site I hesitate recommending using that particular method.There are other manual fixes to try. https://www.securitystronghold.com/solutions/windows-cannot-find-problems/windows-cannot-find-wuapp-exe.htmlI have pro and and I don't seem to have it on my computer.Further reading it seems the Troubleshooter method seems to work.