On my Fujitsu P1510 tablet notebook, there's this annoying pop up saying unknown hardware found. In device manager, there's no special indication. I had to look under 'System Devices' to find a 'unknown' device. In its property it says the location is on Intel(R) 82801FBM LPC Interface......
This problem did not come originally with the laptop so I would assume either some virus or software un/installation had caused it.
Delete it and it will come back after hardware scan.
Thanks to James Norman, I have stopped it from happening. But I cannot be sure of any side-effect, because I now see two identical devices listed under System Devices in Device Manager as "Intel(R) 82801FBM LPC Interface Controller - 2641".
Here's the solution:
1. Right click on the device, and goto Properties.
2. Goto the Driver tab, and click on Update Driver.
3. Click on the "Browse my computer for driver software" option, then let me pick from a list of device drivers.
4. Click on the show all devices option, and then select Intel from the Manufacturer side.
5. In the right hand side (Model) scroll down until you find your Model,
in my case it was Intel(R) 82801FBM LPC Interface Controller -
2641.(Note the (R) on Intel.