DVD drive shows conflict in Device Manager in Windows 7, yellow exclamation mark on the device (pxhlpa64.sys)

Sometimes, Sonic Solutions driver pxhlpa64.sys driver causes a software conflict.

CAUTION: MODIFYING WINDOWS REGISTRY MAY CAUSE ISSUES IN WINDOWS, PLEASE USE CAUTION AND BACKUP THE REGISTRY KEYS PRIOR TO MODIFYING THEM.

To resolve this, do the following:

1. Open regedit
2. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318} registry key.
3. Right-click UpperFilters in the right pane, and then click Delete. Click Yes to confirm the deletion of the UpperFilters registry entry.
4. Right-click LowerFilters in the right pane, and then click Delete. Click Yes to confirm the deletion of the LowerFilters registry entry.
5. Restart the computer.

Ref: http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/sonic-solutions-pxhlpa64sys-driver-not-digitally/fbe9db14-6cca-4a1f-a715-1d4232bf3e81?auth=1

Use at your own risk or call our computer experts to complete the above steps for you.