most externally beaded windows are fine.
to remove the beads on some, first the rubber gasket has to be removed from the inside then the beads can be removed.
on others a double sided glazing tape may be used and if so the beads can be removed but the tape needs to be cut from the inside in order for the glass to be removed.
however there are a small number which are not up to scratch.
but don`t panic
levi lewy
August 2009