A display driver has stopped working and has been recovered issue

I got this issue today where the computer first began to 'hang' and then the screen momentarily turned black and came back again with a pop up saying that the display driver stopped working and has been recovered.

The fix suggested was upgrading the drivers. So, opened the device manager and right click on appropriate device and click on update driver. Windows then says that the drivers are all updated.

Then, why is the issue persistent ?

I downloaded these drivers from HP's website. I remember I was told not to download drivers from the vendor's site as it may prevent HP from sending updates. I believe the drivers are outdated.

Do I download the drivers from the vendor's website ? if yes, which one ?

Display Adapters

Intel Graphics Media Accelerator HD (8.15.10.1986 A)
Ati Radeon HD 4550 (8.713.0.0 B)

Misc

Laptop: HP Pavilion DV4-2126tx
OS: Windows 7 Home Premium, 32bit

Microsoft provides a KB article about the issue:

"Display driver stopped responding and has recovered" error in Windows 7 or Windows Vista

http://support.microsoft.com/kb/2665946/en

Change the TdrDelay value to 8 and look if this fixes it.