win7 missing cd-dvd driver/img

[kage]

http://capitalhead.com/articles/windows-7-dvd-drive-not-working-problem-missing-disappeared-error-gone-not-found-not-recognized-in-x64-and-x86.aspx

In the right pane, click UpperFilters. You may also see an UpperFilters.bak registry entry. You do not have to remove that entry. Click UpperFilters only. If you do not see the UpperFilters registry entry, you still might have to remove the LowerFilters registry entry. To do this, go to step 8. >>

ta upper/lower filters ειναι οι σταυροι αριστερα απο την λστα ή εγγραφη που λεγετε ετσι?