I tried to find the drive mftr and discovered this:
Manufacturer: (Standard disk drives)
Location: Location 0 (Channel 0, Target 0, Lun 0)
Device Status: this device is working properly.
I went to a help page of microsoft
http://support.microsoft.com/default.aspx/kb/886088
I tried to find the file <Sms_def.mof file> doing what was suggested, but
the file does not come up. Where should I look for it?
Somehow I don't think I'll find it, as it seems to be annihilated.