This error is caused by a missing Windows update KB2999226
Please note that on Windows 7 Service Pack 1 is required to be installed to use the TeamSpeak Client.
- Install all available Windows Updates, restart and check for updates again. Install any updates found and repeat until no more updates are found.
- Download VC++ Redistributable From Microsoft Website or From TeamSpeak. Please make sure to choose the correct one for the TeamSpeak Client you're trying to install / launch. If you're trying to run a 32-bit client or still have a 32 bit operating system use the x86 file, everyone else use the x64 file.
- Run the downloaded file and select Uninstall if that is offered then reboot.
- Run the downloaded file and install.