Symptoms: The computer continues to receive a blue screen with an error in the file igdpmd64.sys at random times.
Solution: There is a known conflict between Microsoft Update KB2670838 and Hybrid Video cards which results in the system becoming unstable and displaying the notorious “Blue Screen of Death”.
1. Go to Control Panel > Add Remove Programs > Show Installed Updates
2. Locate KB2670838 and uninstall
3. Reboot the system
The system should now be stable.
Symptoms: Computer is an HP Model that suddenly blue screens and returns an error with keycrypt64.sys before rebooting.
Items Needed: USB Mouse, USB Keyboard, Windows Boot Disk or Utility Disk
Solution: A recent update push to Constant Guard (Comcast) has a conflict with the default keyboard / mouse dll for HP Machines. This is a temporary fix.
Step 1. Boot the machine using the utility boot disk to access a command prompt.
Step 2. Copy C:\windows\system32\drivers\hpqkbfiltr.sys to C:\windows\system32\drivers\hpqkbfiltr.old (THIS WILL DISABLE YOUR KEYBOARD AND MOUSE THAT ARE NOT USB)
Step 3. Attach the USB Keyboard and Mouse plugged into a side port and reboot the laptop. Windows should boot normally.
Step 4. Once logged into windows, go to control panel, add/remove programs and remove Comcast Constant Guard
Step 5. Reboot and use the USB Keyboard and mouse to rename C:\windows\system32\drivers\hpqkbfiltr.old to C:\windows\system32\drivers\hpqkbfiltr.sys
Step 6. Reboot, unplug USB Keyboard and Mouse, computer should be running fine..
Special Thanks to Bob Bailey for posting this solution for the community!