Earlier this month, Microsoft posted a new entry in its list of known issues with fully up-to-date Windows 11 PCs: The HP Smart printer app was installing automatically on Windows 10 and Windows 11 PCs whether they had an HP printer installed or not, changing the names and icons of their connected printers and causing error messages.
Affected PCs will usually appear to have an HP LaserJet M101-M106 connected, so look for that model number in your list of printers (people who actually own one of those HP LaserJets presumably won't have problems). All versions of Windows 11 are affected, plus all currently supported versions of Windows 10; Windows Server versions going back to 2012 can also be affected.
Microsoft continues to look into the issue, but in an update posted yesterday, the company stated unambiguously that HP was not to blame. The company also says that most printers should continue to work fine, and that they "will continue to use the expected drivers for printer operations." But if your printer relies on a third-party app for additional functionality, that may be broken.