How can I uninstall a Gigabyte raid contoller without crashing my Win 7 OS? Uninstall is being prevented because "the OS is on the contoller"!
Win 7 64 bit is on a Crucial SSD boot drive and AHCI is set in BIOS. However the raid controller is setting all internal drives to SCSI!
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In my case it was Gigabyte Raid Configurer fault. So in Windows 10 I just entered Safe Mode, searched for "recovery" (via Windows Search), opened Recovery -> Advanced startup -> reboot now, chose "Restore from a system restore point" and selected point related to Gigabyte