Is there any way to programmaticly disable a device? (preferably in .net, win32, or batch).
Most hits on google suggest using devcon but it does not seem to be working on Windows Vista/7 64bit.
http://stackoverflow.com/questions/252185/-net-how-do-i-disable-a-system-device has a solution using SetupDiSetClassInstallParams but it also doesn't work for Vista64.
How is devcon not working for you under the 64-bit OS? Are you not able to find the executable, or is it failing somehow? Is an error being thrown?
The 32-bit version of devcon doesn't completely work in WoW64 emulation; I've seen it fail to disable devices as well. The Windows Driver Kit includes a 64-bit version of devcon, which works. It also includes the source code to devcon, so you can see that devcon is just a wrapper for the Setup API.
When you tried calling into the Setup API directly, was it from a 32-bit or 64-bit process? Based on experiences using devcon, I suspect that you need to call into the Setup API from a 64-bit process.