[InstallSection.Noresdup] <Device-id>[,<device-id>]...
The NoResDup section is similar to the NoPosDup section except it works for devices which use no resources. When the Device Manager installs a device, it always looks for a NoResDup section. If the section is found the Device Manager will search the \enum\root branch of the registry for devices whose Device-ID matches any Device-ID in the NoResDup Device-ID list. If a match is found, the Device Manager will assume it has found a duplicate entry and will move the \enum\root entry to the enumerator branch and remove the root node. Listing an ID in this section can have unintended side affects as there is no way to tell the difference between a duplicate and a second instance of the device.