Skype using 80% to 100% cpu usage
A lot of people including me faced this problem that sometimes it happens that Skype starts using 100% cpu usage. This can become very frustrating as it reduces the system speed. Here is a little trick which will work for most of the folk.
So here it goes. If your Skype is using 100% cpu usage then the only reason why it is using is because you have linked your Facebook account with Skype. To solve this go to your Home tab in Skype, then move to skyp Home and there on the right side you will see a "Ring". Click on it, and disconnect your Facebook Account. The screen shot is attached for reference only.
That's all from my side. Let me know how well it worked for you.