Issue: Unable to uninstall Skype for Business 2015 client.
I have saw many request where people want to uninstall Skype for Business client however there is no straight forward way to uninstall Skype for Business instead you can stop Skype for Business running.
Follow below steps:
1. Open Skype for Business client > Gear Icon > Tools > Options > Personal.
2. Remove below recheck mark:
Automatically start the app when I log on to Windows.
Start the app in the foreground.
Note: If you want to keep Skype for Business from running when Windows boots, click the Gear icon and select Tools, then Options. Keep checked “Start the app in the foreground” check box.