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After installing windows 10 on a HP HP PROBOOK 640 G4 laptop there are 13 missing drivers. These are PCI data acquisitions and signalling processor, sm bus controller, unknown device, pci simple communications controller, PCI memory controller. All can be updates by installing windows 10 updates. Instructions below.

Don`t forget the correct power supply is 19.5V 2.31A BLUE TIP


HELP Area...
Update drivers in device manager on windows 7.
Update drivers in device manager on windows 8 and 8.1.
Update windows 8 updates program.
Update drivers in device manager on windows 10.
Update windows 10 operating system.
Downloading and opening drivers in ZIP files.
Updating drivers by hand using ZIP files and device manager.
Opening and extracting HP drivers.
What to do if you have no wifi or lan..
Fixing mouse not working.
Using CMD to update drivers.
Recognizing common driver types
Resetting a windows 8, 8.1, 10 and 11 tablet or laptop
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