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T510 - Downgrade to XP (3 Unknown devices in Device Manager)


After downgrading the T510, there are 3 unknown devices found in device manager. Tried running ThinkVantage System Update however there are still 3 devices listed.


List of devices below:


VGA Controller

VGA Controller


  1. Boot the laptop up
  2. Press F1 to boot into BIOS
  3. Select Config
  4. Select Display 
  5. Set options as :
  6. Boot Display Device : Thinkpad LCD
  7. Graphics Device : Discretre Graphics
  8. OS Detection for NVIDIA Optimus : Enabled
  9. Press F10 to save and reboot
  10. Go to T510 Nvidia driver page for XP here
  11. Download the driver and install.





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