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# Windows XP SP1 Installation Error: "An internal system error occurred. Please refer to DXError.log and DirectX.log in your Windows folder to determine problem." or "DirectX did not copy a required file." If you see either of these errors, please try the following steps to see if it resolves the issue:

* Open Start > run > and type regedit and click OK.
* Scroll to the top and click "My Computer".
* Click "File" then "Export. (always backup a copy of your registry prior to altering it).
* Review permissions for each of the following registry entries:
o HKEY_CLASS_ROOT/Microsoft.DirectSoundCaptureAecDMO.
o HKEY_CLASS_ROOT/Microsoft.DirectSoundCaptureAgcDMO
o HKEY_CLASS_ROOT/Microsoft.DirectSoundCaptureNoiseSuppressDMO
* Right click on each of these and select permissions.
* Review the permission that the user (even if Administrator) has full control. If not, permissions of the registry have been changed and you must update the permissions. Update the permissions and run the install again, if fails for a different registry entry, you may need to go to the top of the registry and change permissions or handle changing registry entry permissions individually.

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