JSI Tip 7933. You receive 'The atapi.sys is already in use ...' error during a Windows XP service pack installation?

If you have a missing or incompatible RAID driver installed on your system, you will experience this behavior.

To troubleshoot the problem, see An explanation of the Device Manager error codes, with possible resolutions?

NOTE: Download the latest Windows XP driver from your RAID controller's manufacturer.

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