You might be experiencing a Registry protection problem.
Try this solution;

Go to Start, Run.Type "regedit" without the quotes and hit enter.

Navigate to

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\ENUM\PCI

and you will see a number of keys of the form "VEN_xxxx", where xxxx are strings like "1102&DEV_0004&SUBSYS_00011103&REV_04". Under each of these folders will be another folder with a long numerical name. Open each folder and look for the "DeviceDesc" which matches the hardware you are trying to install. Right Click on the "VEN_xxxx" for that device and select 'Permissions' and then tick "Allow" for "Full Control". Close Regedit and then continue with the installation of your device.