I give up trying to solve this problem.The DVDR burner (oem-pioneer106d-Sony Vaio-pcv-rs420) does not recognize anything to do with dvd's.It will however burn,play cd's.Occasionally I can burn a dvd,but only at 2x speed .The burnt dvd or any other dvd can not be read or played on the pc,however,put it in the stand alone dvd player and it plays perfect on the tv.Lasers are cleaned with a commercial dvd cleaning disc.This is a problem that seemed to have happened overnight.Do I buy a new DVDR drive or keep looking elsewhere for the answer?