first unsinstall Logitech programs
then
" Go into the registry editor (go to Start Menu, Run and type regedit)
2. Go to this location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E96C-E325-11CE-BFC1-08002BE10318} and delete the two items "LowerFilters" and "UpperFilters"
3. Go to this location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{6BDD1FC6-810F-11DO-BEC7-08002BE2092F} and delete the item "LowerFilters"
4. Go to this location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{6BDD1FC5-810F-11DO-BEC7-08002BE2092F} and delete the item "UpperFilters"
5. Move back to the root of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\
6. Launch a search (i.e Ctrl F with the option to search in "Data") and type "LVUSBSTA". For any place found (only in the "Control\Class" area), just delete the "LowerFilters" item (it is the item that contain the value LVUSBSTA found). For me, I didn't find any other places than the ones mentioned here.
7. Then uninstall the midi device driver, unplug it and plug it back in. Windows should recognise it and install it and it should work!"
Here is a link to a forum, which reported the fault: