Today voobly outo-updated, after restart I have this error.
I tired to clean voobly installation and re-install but same problem.

Windows 7 is no longer supported by our client.

If you are still on Windows 7, you can upgrade to Windows 10 for free.
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Please also read:
https://www.voobly.com/forum/thread/343091/:1428200#post1428200
https://www.voobly.com/forum/thread/343091/:1428201#post1428201
https://www.voobly.com/forum/thread/343091/:1428202#post1428202

Nah w10 sux.

I won't change my operating system for aoc.

You did everything for kill voobly and aoc. You will achieve success faster than you expect.

Goodbye!

fu i cant use win 10 im having 12 years old thinkpad. and i dont want to use this stupid system, i tryed once, it overcharge my system, my fan is running crazy
the time is now to stop playing

+++

We have rolled back to version: 2.2.5.71. Windows 7 will continue working for now.
Install https://www.voobly.com/updates/voobly-v2.2.5.71.exe and it should work again.

Im with the boy. We do refuse to leave win7 behind. Reasons why??

win 8, 10 and 11 sucks as he clearly expressed it. I have tested them all. YES. I DO AGREE. I stop playing this ancient software than installing those OS named.

Long life to win7

Bro, The same thing happened to me and I managed to install the dll, but then I got this error and I uninstalled it, and everything doesn't work and I get this;scared

Start > Run > type "cmd" > right-click on Command Prompt > run as Administrator

Execute the following commands:
dism /online /cleanup-image /scanhealth
dism /online /cleanup-image /checkhealth
dism /online /cleanup-image /restorehealth
sfc /scannow

Then reboot. You may have re-install Voobly Client again.