The last official driver package for the MobilePre was designed for Windows XP and Vista 32-bit. While Windows 11 is strictly 64-bit, the driver architecture is incompatible. You cannot simply "force install" the old .inf file without serious system modifications.
Older USB interfaces can be picky with USB 3.0/3.1 ports. Try a USB 2.0 hub if you experience random drops. M-audio Mobilepre Usb Driver Windows 11
The M-Audio MobilePre USB is a compact, portable audio interface designed for musicians, producers, and podcasters. It allows you to connect your instruments, microphones, and headphones to your computer, enabling high-quality audio recording and playback. With its rugged design and USB connectivity, the MobilePre is an excellent choice for music creators on-the-go. The last official driver package for the MobilePre
(temporarily):