I did look at the Windows 7 downloads.
You do not necessarily need to use a chipset inf, as the OS likely already has the needed information.
Also, the chipset inf is not a "driver". Review Intel® Chipset Software Installation Utility — What is the Intel® Chipset Software Installation Utility?
To consume the cpu, as you describe, something is running, which you will have to troubleshoot. As I said, not everything that is running shows in Task Manager.
Two utilities I use are:
Doc