If else failed, try running Regedit
Before you follow the instruction below, make sure you check your DVD rom under control panel. If it's running in PIO mode, try below:
go to following key:
It has subkeys like 0000, 0001, 0002, etc. Normally 0001 is the primary IDE channel, 0002 the secondary.
Delete MasterIdDataChecksum or SlaveIdDataChecksum, depending on...