This is just true. I'm speaking from experience : I remember that HP Pavilion machine for which HP was officially providing a BIOS upgrade. Once upgraded, the system would simply crash repeatedly. HP support was telling "Send the machine back to us, your disk will be wiped and the problem will be solved". Some people did that, I preferred taking the risk of a downgrade, that worked fortunately.

This was my first experience. The worst is that despite many people complaining, the BIOS update was never removed.

Later on, I had problems with two laptops, one had temperature problems after "upgrading", on another one it changed the behaviour of some ACPI methods that weren't working well afterwards.

I currently have an MSI laptop, and am very much in line with what the company says about BIOS updates. Their philosophy is : If you don't have a problem with it, don't touch it.

I couldn't agree more.