In 99% of cases, this keyword arises from one of three scenarios:
Searching for "zmuipng" across official databases (Microsoft Update Catalog, official hardware vendor sites) returns . It doesn’t correspond to any known: zmuipng driver download
If the scan finds nothing but your PC still behaves oddly, back up your personal files and perform a (Settings > Recovery > Reset this PC > Remove everything). It’s the only way to be 100% sure. In 99% of cases, this keyword arises from