Since PC Experimental 1.22 Update 3 - Version 1.22.156540, Experimental works for me on Windows 7 again.

I have the same issue on Experimental 1.22.156458, 1.21 works fine.
Launcher starts normally but when you press play or join (this particular server) it crashes when it wants to start the game exe. At the part when it says at bottom of the launcher "Battleeye: Launching the game". When you close the " Dayz has closed in an unusual manner" window, the launcher goes back to normal.
Exit Code: 0xC0000139 - STATUS_ENTRYPOINT_NOT_FOUND
Windows 7 Home Premium Service Pack 1 ; I7- 4790S ; Nvidia GeForce GTX 965M