As well as the bloatware added deliberately by Microsoft that's already mentioned, this method can't touch spyware and bloatware that's automatically reinstalle

As well as the bloatware added deliberately by Microsoft that's already mentioned, this method can't touch spyware and bloatware that's automatically reinstalled by the BIOS after reinstalling Windows. Unsurprisingly, the only company I could find evidence of actually having done this is Lenovo: https://betanews.com/2015/08/13/lenovo-bios-tool-prevents-clean-installs-of-windows-by-downloading-crapware/ https://betanews.com/2015/08/13/lenovo-bios-tool-prevents-cl...