Hi,Took out the CD rom and replaced with a CD rom known to work it recognised the CD rom but wouldnt load a disc,put back the original it showed up in my computer i tried a disc and it then just vanished when i clicked on it, windows informed me that the Cd rom is in another location where i dont know.Beginning to think it may be easier to format and start again.Oh yes i read the microsoft help for this by deleting the upper and lower etc.Problem there is i have none of these in the registry,it then told me if that was the problem go into device manager,you guessed nothing there.