Window coming out of its frame

HMC

Registered User
Messages
199
Hello,
I have double-glazed windows (year 2000 or so) and two of them, when opened wide, refused to shut properly. The corner did not return to its original place and at times the window was about half an inch from the frame. I managed to pull one back in but the other is not cooperating. Is this going to be a professional job to fix or has anyone any tips they can give me.
Thanks
HMC
 
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