Question about HP Pavilion a815n (PS512AA) PC Desktop

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Windows xp does not recognize my cd driver since I have replaced my power supply, no disks play at all. control panel>device manager ..reads a code #41,..even tried to restart to an earlier date at no resolve!..do I need a new driver,or is it something that can be programmed? I currently have hp pavilion a815n w/dvd 630c driver.

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WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To resolve this behavior, follow these steps: 
Start Registry Editor (Regedt32.exe).
Locate the UpperFilters value under the following key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

On the Edit menu, click Delete, and then click OK.
Locate the LowerFilters value under the same key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

On the Edit menu, click Delete, and then click OK.
Quit Registry Editor.NOTE: After you remove the Upperfilters value and the Lowerfilters value, if you notice lost functionality in a particular program, such as CD recording software, you may need to reinstall that software. If the problem recurs, consult with the software vendor for assistance. 


Restart your computer.

Posted on Jan 31, 2009

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In most cases, the driver for a printer is supplied when you purchase it. It is the responsibility of the manufacturer to provide the driver along with the device to make sure the working.

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IMPORTANT: This procedure must be performed while logged in as Administrator or to an account with Administrator rights.
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Most portable hard drives work with any operating system

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HP Media Center m7250n will not play DVDs. It plays CDs just fine. It used to play DVDs but has not played them in quite a while.


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Click on Start, Run, and type regedit and press Enter
Click on the plus signs (+) next to the following folders

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SYSTEM

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If any of the above keys shown in step 4 are listed, right-click on them and choose Delete

After deleting the keys, close the registry editor
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1 Answer

I have a particular program disk that is not being recognized by the CD-ROM reader in my desktop. Other disks are recognized and the one in question works on my wife's laptop computer. I'm running...


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Close all open programs

Click on Start, Run, and type regedit and press Enter
Click on the plus signs (+) next to the following folders

HKEY_LOCAL_MACHINE

SYSTEM

CurrentControlSet

Control

Class

{4D36E965-E325-11CE-BFC1-08002BE10318}

This folder is the DVD/CD-ROM Drive Class Description in the registry. Look for any of the following names in the right hand column.

Upper Filters

Lower Filters

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Lower Filters.bak

If any of the above keys shown in step 4 are listed, right-click on them and choose Delete

After deleting the keys, close the registry editor
Reboot your computer

Open My Computer and check to see if your CD or DVD drives have returned. You may also want to open Device Manager and verify that the yellow exclamation and error code on the CD or DVD drive is gone.
Hope this helps

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