Why can't I open the console in Oblivion?
Solution 1:
Make sure you have set bAllowConsole to 1 in your oblivion.ini file.
It's likely you had this set on your old PC and not on the new one.
Solution 2:
There is a known issue with Microsoft eHome Infrared Transceiver - If the other methods don't work, then uninstall this:
- Go to your Control Panel,
- Click System and Security, -> System,
- Go to Manage Devices, and find & click on Human Interface Devices
- Once in there find a file called "Microsoft eHome Infrared Transceiver" and uninstall it (My info came from here: http://www.gamefaqs.com/boards/959559-/56821937)