1) Open Start, Run; then do any of steps 2-5 2) To remove image preview, type and hit enter regsvr32 /u shimgvw.dll 3) To readd image preview, type and hit enter regsvr32 shimgvw.dll 4) To remove media preview, type and hit enter regsvr32 /u shmedia.dll 5) To readd media preview, type and hit enter regsvr32 shmedia.dll this is the one you want.. regsvr32 /u shmedia.dll