Disk I/O Error in Skype 5.5

While using Skype Version 5.5 today, I got this error “Disk I/O Error” I am using Skype for almost a year now. In 12 months I haven’t got this error. I need Skype every time. If anyone knows about the resolution on this error please guide me as soon as possible. Thank you.

Error:
Disk I/O error. Right-click the Skype icon in the Windows taskbar at the bottom right of your screen and choose Quit. Then restart Skype. If you keep seeing this error, please contact Skype customer support.
