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After installing windows 11 on a HP 15 15-BW550SA laptop there are 2 missing drivers. 1 is SMbus controller and the other is Unknown device. The correct drivers can be found by updating windows 11 and installing Intel chipset. For windows 10 they are the same plus Network controller, PCI encryption and decryption controller and HP wireless button. Most can be installed by updating windows 10. The HP wireless button and RTL8723De b/g/n pcie adapter wifi can be downloaded, click each.

Don't forget the correct power supply is 19.5V 2.31a blue tip