Chosen Solution
I am trying to load windows 7 and there is no launch csm option any more! Please help!!!
Hi, You must find first “Secure Boot Control” and disable it. Save and exit. Go in the BIOS again, and search for UEFI boot or similar and change it to CSM (normally in Advanced settings). Regards.
What I did was disabling all boot devices in boot priority section; then I entered in uefi bios os and restarted pc; then in my boot options I saw my flash.
The version BIOS 515 Update EC FW is a solution fast http://www.asus.com/supportonly/D550MA/H… Ir. Tshimsix
