If you are using Skype for your online activities, you might be aware of :
- screen sharing is randomly taken off and restored in the last two weeks
- skype has issues with voice connection. the known fix is to restart your computer
Here is a link, where you can check the status:
this is Skype owned and thus, I do not consider it entirely trustworthy.
You might want to consider also:
If you know more reliable reference cite, pls do share.