Upgrading from Windows 7 Beta to Windows 7 RC

Already their has been lot of rumors about the Windows 7 RC . Today the Engineering Windows 7 blog has posted the long article explaining how to upgrade from Windows 7 beta to Windows 7 RC. Here are some of the main points from the long post

Here’s what you can do to bypass the check for pre-release upgrade IF YOU REALLY REALLY NEED TO:

1. Download the ISO as you did previously and burn the ISO to a DVD.
2. Copy the whole image to a storage location you wish to run the upgrade from (a bootable flash drive or a directory on any partition on the machine running the pre-release build).
3. Browse to the sources directory.
4. Open the file cversion.ini in a text editor like Notepad.
5. Modify the MinClient build number to a value lower than the down-level build. For example, change 7100 to 7000 (pictured below).
6. Save the file in place with the same name.
7. Run setup like you would normally from this modified copy of the image and the version check will be bypassed.

These same steps will be required as we transition from the RC milestone to the RTM milestone.