Forgive me if I am repeating, but I had the same problem where my
Logitech web-cam driver conflicts with the Midi Keyboard (Evolution
MK-425C) and thanks to various posts have solved the issue. I am now
able to use the Logitech web-cam at the same time as the midi keyboard.
Initially I only had the midi device installed and it worked fine.
Then, I installed the Logitech driver and the midi device was no longer
recognised by Reason (my music software).
To solve the problem, I did the following:
1. 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!
Thanks to all the people who posted in various forums. All I've done is
summarise the bits and pieces that eventually worked for me.
--
impermanence33
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