This document applies to HP Touchsmart 520 Series PCs with Windows 7.
When you try to burn or read a disc, nothing happens or an error stating that the drive cannot be found appears in the CD/DVD burning software.
note:If you have upgraded a computer from Windows Vista to Windows 7 and the drive was working before but is no longer working correctly in Windows 7, start at Step 5 to remove the upper and lower control filters from the registry (step by step).
note:If the drive cannot be enabled, a required software service or driver is disabled or not functioning properly. Double-click IDE ATA/ATAPI controllers in Device Manager to see if there are any problems and troubleshoot them according to the error codes.Resetting the BIOS may also resolve this problem. To reset the BIOS: restart the computer, press F10 repeatedly at startup to open the BIOS Setup Utility, press F5 to reset the BIOS values to their default setting, and then press F10 to save and exit.
note:Disc recording software that comes with HP and Compaq computers are made to recognize only the original CD and DVD drives that come with the computer. If you have added a new drive, use the disc burning software that came with the drive or use the native burning capabilities of Windows 7.
note:If the CD/DVD writing software that you use was purchased separately, uninstall the software, restart, and then use its installation discs to install the software, and then restart again.
note:Those familiar with editing the Windows registry can save time by adding a LowerFilters value to the Windows Registry instead of reinstalling the software. To do so, skip to the next Step 6b.
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