What I might is run the following registry file which will remove the UpperFilters value completely.
Copy and paste the following into Notepad and save as a .reg file (save with the .reg extension and give it any name such as fixcd.reg):
First create a System Restore point then double-click the saved .reg file, add to the registry, and restart the computer.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{4D36E965-E325-11CE-BFC1-08002BE10318}]"UpperFilters"=-"LowerFilters"=-
Afterwards if iTunes is installed and says it needs GEARAspi it should be safe to go ahead and install the Gear drivers:
http://www.gearsoftware.com/support/drivers.php