But while Microsoft said that keys obtained for the beta won't work with the RC, others have countered that, in their experience, they do. Noted Windows blogger Ed Bott, for instance, has said that product keys obtained for the earlier beta "work just fine" with the RC.< Can I upgrade from the Windows 7 beta? You can, although Microsoft doesn't want you to. As is, the RC blocks installation when it recognizes that the PC is running Windows 7 beta. Microsoft did this, it said back in early April, because it wants users to "experience real-world setup and provide us real-world telemetry."
Instead, Microsoft told users to either do a clean install -- wiping out their copy of Windows 7 beta, all the applications they'd added and all the files those applications had generated -- or revert back to Vista Service Pack 1 (SP1), which they had presumably been running before they upgraded to the beta, then install RC.
To get around the block, copy the contents of the Windows 7 RC DVD to a local folder -- a bootable USB drive works, as does any root-level folder on the machine running the beta -- then on that drive or in that folder, open the "Sources" folder. Open the "cversion.ini" file with Notepad, and change the value of "MinClient" to "7000." Save the file and run Setup.
Microsoft walks you through the steps here.
Can I upgrade from Vista? Yes, but you can only do an in-place upgrade to Windows 7 RC from Vista SP1 or SP2, the latter still in RC form itself.
What edition of Windows 7 is the release candidate? The RC is the Ultimate edition of Windows 7, the most expensive of the line.
What languages are supported? Microsoft has limited the RC to English, French, German, Japanese and Spanish. Arabic and Hindi, which were available in January's beta (though Hindi only in 32-bit) were dropped in favor of French and Spanish.
Can I upgrade from Windows XP? Nope.
Although Microsoft will sell Windows 7 "upgrades" to XP users, it's just a version term for them, allowing them to buy the new OS at a lower price. When Windows 7 goes final, XP users will have to do a "clean install" that erases the contents of the drive; the same goes for the RC.
To transfer files and settings from XP to the new Windows 7, use the Easy Transfer utility included with Windows 7 RC. After you've burned the downloaded .iso file to a DVD, insert it in the XP machine's drive and copy Easy Transfer to the PC. When you run it, Easy Transfer will copy files and settings to an external device -- a USB flash drive comes in handy here -- which you can then copy to the PC after you've done the Windows 7 RC clean install.
Does Microsoft provide support for Windows 7 RC? Microsoft doesn't do technical support for pre-release software, so your only support option as an RC freeloader is online, in the user-to-user forums.
When does the release candidate expire? Microsoft pushed out the expiration date for RC to June 1, 2010, nearly 13 months from its debut, significantly longer than the "free" time frame the company gave users for Vista.
On that date, the release candidate will stop working, but you'll get plenty of advance notice. According to Microsoft, Windows 7 RC will start automatically shutting down at two-hour intervals beginning March 1, 2010.
By the way, if you stick with the beta, remember that it expires much sooner, on Aug. 1, 2009, with bi-hourly shutdowns starting July 1. In each case, Windows 7 will remind you two weeks before the shutdowns begin that the beta or release candidate expiration process is about to start.