BobVila.com

I discovered the secret soon after trying to strip the paint off in place... They are very easy to remove. First, remove the stops using a putty knife. Then, and here is the trick, on the sash itself there are 2 screws on the front face. These screws hold the metal bead in place. The screws can be found about 2 inches from the top and the bottom of the sash. If you have heavily painted windows you may have to dig the paint out of the screws. Remove the 2 screws for one side. Now you need to slide the metal bead out. I did this by raising the sash and placing my putty knife under the sash so when I closed the sash it would slide the bead out when window is lowered. Then I grabbed the bead w/ pliers and pulled it the rest of the way out the top of the sash. One the bead is out the window will very easily pull right out. Good luck..

Correction