I will give you 100% security that solves this
The problem is that you do not have your windows updated that from what i see is windows 7
The problem is not the ts3 installer the previous answers will not solve anything as you will continue to leave the same.
Well what you should do is the following:
1. Download service pack 1 if it is windows 7 here I leave the link this is depending if it is windows 7 32 or 64 bits sometimes you get 86bits which is the same as 32 bits is not alarmed.
Windows 7 (32bits)x32 (64bits)x64 The download starts automatically after clicking on any of the links do not move anything else.
2. And the next error is that you need the updated runtime.
Which is something primordial and essential for windows 7
Runtime : (32bits)x32 (64bits)x64 Just let it download and follow the instructions.
Any other problems about this will help you solve it.
@BedrO™
p.d : The problem is not the teamspeak 3 is your windows with this you solve it permanently.
Otherwise the servipack 1 lasts a long time, so do not be alarmed if it lasts.
We are here to help.