In an earlier thread (248704), I described an XP Pro SP2 startup problem resulting in error c0000135 "winsrv not found" after a stop at agp440.sys while loading drivers.  The boot log shows that driver actually loaded, but did not load the next driver, ACPI Multiprocessor PC and a long list of drivers after that.  Does anyone know if this indicates that the driver is corrupted, and if its filename is acpi.sys?  If the driver is bad, I would like to try to replace it from the installation CD to try to avoid a complete repair install.  The system is a Dimension 8300 and I am now using the SP2 reinstallation CD received from Dell in system recovery mode.  I can not boot in any mode other than with the CD.