Please provide the following details that will help me identify the required troubleshooting steps:

1) Does the error popup when the system has booted into Windows XP or Windows 8?

2) When exactly does the error popup, is it when you try using a specific application or as soon as the system reaches the desktop?

3) What is the system model that you are using?

4) What is the version of Windows 8 installed on your computer, is it the ‘Release Preview’, ‘Consumer Preview’ or the ‘RTM’ version?

Please reply to this post so that I can assist you further.