Start from the Windows XP CD-ROM, and then perform an in-place upgrade repair.

Note You should follow this method if this error code occurs after you upgrade from Microsoft Windows 98 Second Edition. To work around this problem, use one of the following methods. To work around this problem, use one of the following methods based on the error code that you receive. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:ģ22756 How to back up and restore the registry in Windows Then, you can restore the registry if a problem occurs. For added protection, back up the registry before you modify it.

Therefore, make sure that you follow these steps carefully. However, serious problems might occur if you modify the registry incorrectly. Important This section, method, or task contains steps that tell you how to modify the registry. This error typically occurs because of corruption of the disk.

This specific error occurs when there is a problem performing an inpage operation. This problem occurs because there are some error codes in a third-party program. This error code occurs when the Dpcdll.dll file is missing or corrupted. After you upgrade, there appears to be a corrupted file, a missing file, or a file mismatch. This problem frequently occurs after you upgrade a service pack. The default security provider in Windows XP has changed.Įrror code 0x8007007f or error code 0x8007007e This problem can occur if one of the following conditions is true: This problem occurs if you modified the MountedDevices registry value to change the boot drive letter assignment or the system drive letter assignment. This problem occurs because the drive letter has changed or because certain files cannot be found at default locations. This behavior occurs if one or both of the following conditions are true:Ī third-party backup utility or an antivirus program interferes with the installation of Windows XP.Ī file that WPA requires is manually modified. This problem may occur if a file that the Windows Product Activation (WPA) requires is damaged or missing. The following sections describe why you may receive a given error code. For example, you may receive error code 0x80004005. Note In the error message, nnnnnnnn represents the specific error code that you may receive. A problem is preventing Windows from accurately checking the license for this computer.

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