Lost key to access window pvc handle/lock

[mikerom]

I have lost the window key to open a interior PVC handle/lock.
I have bought a replacement PVC handle/lock but I cannot remove the original. I can access the top screw but i cannot turn the handle to access the bottom screw as it is locked......please help

 

[crank39]

Snap the lever by forcing it open, the alloy is very soft and will crack away around the locking area allowing it to open to reveal the last screw, if you struggle then slide a short bar onto the lever or anything that will give you more leverage