Thank you for posting your question in Microsoft Community forums.
From your post it appears that you are getting an error software exception 0xc000049 occurred in the application 0x6db88768 when you open up mails.
Quick questions:
Does the issue occur only when you open the mails from your e-mail account? Which e-mail account are you using?
Are you using any e-mail client such as Microsoft office Outlook?
Which web browser are you using?
To help troubleshoot error messages and other issues, you can start Windows 7 by using a minimal set of drivers and startup programs. This kind of startup is known as a "clean boot." A clean boot helps eliminate software conflicts.
Perform clean boot and check for the issue.
Note: After troubleshooting, make sure to put the computer to start as usual as mentioned in Step 3 from the above provided KB article.
Please get back with the required details and also the outcome of the steps suggested so that we can assist you better.