This will help if you installed an incorrect or mismatched driver. Try to set a system restore point before installing a device driver.
It is highly recommended to always use the most recent driver version available. not compatible, control surface, Windows and other trusted sources.
When I download Driver, 6.1.3 and UPDATE DRIVER, Windows 10 reply Existing driver is the Best Problem is that I can not install Driver, 6.1.3. The defect affects only the MIDI input and causes the MIDISPORT Uno to distort incoming MIDI data resulting in random notes, inaccurate note on/off messages, as well as pitch bend. M-Audio Midisport 2x2 Aniversary compatibility Win 10 圆4 When I plug&play the USB device it installs Driver, 5. M-Audio has identified a defect in a manufacturing run of its popular MIDISPORT UNO 1x1 MIDI interfaces. Changed installer to use static product and package ID GUIDs versus dynamic build time generated GUIDs Note: Changed build to use Avid signing certificate in place of the expired M-Audio signing certificate. /rebates/&252fradium-midiman-61-driver-mac. Updated driver installer to use a newer version of the Microsoft Visual C++ 2005 Service Pack 1 Redistributable installer which fixes this install failure. On the other hand, mice, keyboard etc function through these Macbook ports, so they also seem not to. Both come alive with Dell laptop so they are not broken. Testing, as I have a second midisport also, the same thing.
Addressed Microsoft Visual C++ 2005 Redistributable installer issues. When I plug the Midisport straight into Macbook USB slot, it is not recognized (no lights etc).