I have an Optiplex 755 desktop and the same thing occurs on my system. IMO, it's a BIOS/POST "issue" but nothing to be concerned with, as long as pressing F1 boots you into Windows. If you cannot boot into Windows...that's a different story...message may indicate a problem with the boot drive/hard drive.
The message should be taken at face value.
If you get a black screen with white lettering which includes the message: "Alert. Failed to detect one or more drives...", followed by options to press F1, F2, or F5...
In my case, I disconnected my optical drive and the message indicates that (properly)...no optical drive is detected during POST. Apparently, the BIOS for my system is structured so that it is a default item checked in POST. POST is a pre-boot check done by the system which checks to see if primary hardware components are properly detected. This happens before any attempt is made to boot into Windows. Pressing F1 indicates that user is aware of the lack of a given component.
POST does not make this assumption on a self-built or non-OEM system, to my knowledge.
I receive this screen and message...every time I boot this Optiplex system, I just hit F1 and system boots into Windows.