It being a Windows message is highly unlikely, considering you're Link Removed - Invalid URL to ever say anything about this message.
But that message reminds me of something: I interned for a short while at a company that used a software called LabTech to provide customers with tech support. It was able to remotely and automatically update our clients' software, run/schedule programs like defgrag, and it also let us take control over a client's computer if they needed direct support. Also, in a very similar vein to this message, we could also have it automatically give the user notifications about possible problems.
Does what I'm describing sound anything like you or perhaps some technical support person ever put on your computer?