my hinges will not close my top hung window pvc?

Hi there:
Assuming that the glazed unit has the push in retention bead outside -
First you need to remove the inner seal by pushing the
window outward. Prize the seal up and remove all or it. Next go outside and with the aid of a paint scraper push inward and upward between the frame and the retention beads on the longer side. It will sort of ping out. Next remove the other beads in a similar fashion.
When you fit the new window do the opposite of removal.
If the retention beads are inside go outside first and remove the seal as above.
PS Let me no if this is helpful. Yours LT

trampus09
September 2009