4. Unused Skype credits vanish after a period if they aren't used
If you've ever made a call from Skype to a landline, you probably have a few dollars in credits lying around. But if you don't use them at least once every 180 days, Skype inexplicably "deactivates" your credits. It doesn't delete those credits, however. It just hides them in a virtual back room.
To get them back, look for a "Reactivate credit" button where your balance used to appear. If it's not there, visit this webpage to reactivate the credits manually. Signing in to your Skype account is required. (You can also check your balance and the date at which your credits will go dark on this page.)
5. Skype erupts with noisy notifications for everything
By default, Skype is a noisy companion. Skype will alert you with a chirp or beep and a text alert when just about anything happens, even when it's the birthday of one of your contacts. Tone things down by visiting Tools > Options > Notifications > Notification settings and unchecking the options you don't want to hear about. To quiet Skype down further, click the Sounds tab and uncheck any additional options you don't want, or click "Mute all sounds" to shush Skype permanently.
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