missing CD and DVD drives

  bpzoom 22:56 12 Sep 2005
Locked

I answered a request for help from a friend whose CD and DVD drive no longer worked. When I looked at his machine I found he has XP Professional and under My Computer, and Device Manager there were no signs of the two drives. Discs inserted were not read, although both drives were connected. Reboot made no difference. Went into BIOS and for no good reason other than a hope it might make Windows recognise the D drive I re-ordered the boot sequence to C then D and A. Rebooted and the 2 drives re-appeared. Files were waiting to be read to the CD, I deleted them, and apparently all went well until today 5 days later he emails me to say the CD and DVD drives have "gone missing again". I picked up this earlier thread from 2004, in answer to a similar problem. "Insert your XP CD into your rom then exit out of the installation wizard. Click on Start>>Run then type 'sfc /scannow'. Click on OK this will reset and replace any errors and corruptions..
Note there is a space between sfc and the /..
Can anyone say if this is a solution and what it does before I pay him a visit again? Are there 2 spaces between SFC and / ? Is there another probable answer to this problem than the above?
Thanks

  VoG II 22:59 12 Sep 2005
  bpzoom 23:06 12 Sep 2005

Thanks Vog, I will go again armed with a copy of your link.

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