Some people who are upgrading their PC's from Windows Vista to Windows 7 are finding the upgrade paralyzes their computers, leaving them in a never ending rebooting cycle, unable to use either operating systems.
Many users started to post the problem in a forum on Microsoft's own website on Friday, one day after the highly touted new operating system was released. As of this afternoon, 3 days later, there are still people posting the same problem and no fix from Microsoft for most of the users.
To make matters worse, Microsoft was aware of this exact problem back in July, when it was posted on the Microsoft support website. The article is dated July 27th, 2009, or approximately 3 months before the public release of Windows 7, yet the problem wasn't fixed.