Just installed Spinrite 6.1, runs fine on my MSI B450 Tomahawkk based PC but when trying to run it on my MSI B550 Pro VC mobo on a different PC I can get startup after enabling CSM in Bios and enabling UEFI+Legacy mode for the USB stick. Spinrite comes up with the first screen but after the first keyboard press then no more response from keyboard. Plugged KB out then back in no difference. Tried searches in here but so far stuck without a keyboard. Haven't found a suggestion as yet that works. As stated in other threads there is no solution as yet for UEFI USB boot mode for 6.1 Spinrite.