To resolve the issue you're experiencing, please consult the following article: https://customer.real.com/hc/en-us/articles/204040113
If the issue still persists, please let us know about the following:
•When exactly does the the error message appear?
• What version of RealTimes or RealPlayer is installed? (See https://customer.real.com/hc/en-us/articles/204039513)
• What is the operating system of your computer (Windows XP, Vista, 7, 8, 8.1, 10)?
• Do you have any security software installed (Norton, McAfee, AVG, etc.)?
The more specific you are, the better I will be able to assist you.