They were reporting this morning:
http://www.informationweek.com/news/windows/operatingsystems/showArticle.jhtml?articleID=217300204
That the "Release Candidate" version would be available and could be used till next year for free.
If I wanted to play with the thing, would I have to install it in a separate partition? Or, would it just pop up on the startup screen as a boot-up choice?
Well, there are a couple of ways to try it out.
One is to install it inside a virtual machine like VirtualBox. This will make it run inside a window in your existing Windows installation. The performance won't be great though, and you won't be able to use the fancy GUI effects.
The other way is to install it in a way that will let the computer boot straight into Windows 7. There are a couple of ways of achieving this:
1) Make a clean install of Windows 7, overwriting everything that is currently on your hard drive.
2) Upgrade your current version of Windows to Windows 7. This will keep your existing programs and files, but get rid of your existing OS. In other words, you won't be able to boot into it or get it back when the Release Candidate expires. If you want to get rid of it, you have to reinstall something else.
3) If you're running Vista, open Disk Management, make the partition you currently have smaller and then make a new partition in the free space. You can then pick this partition in the Windows 7 installer and end up with a dual boot system that gives you a menu when you turn it on and lets you choose which OS.
4) Install Windows 7 to a virtual hard disk image on your existing partition. In other words have Windows 7 boot from a file called something like C:\mywin7test.vhd instead of a real partition. This will give you the same setup as in 3, except that you'll have a
slight decrease in disk performance in Windows 7 (because its disk is emulated). Performance wise it's still more than good enough to play around with. The catch though, is that installing it this way is slightly more complicated and involves a quick visit to the command line:
When you boot the Windows 7 DVD, but before clicking "Install now", press shift+F10. This will give you a command line. From here, run "diskpart" and wait for the DiskPart> prompt to appear. Here type "list vol" and find the drive letter of the partition you want the virtual disk image on. Most likely it'll be either C: or D:.
Then type
Code:
create vdisk file="C:\mywin7test.vhd" maximum=20480
This creates a 20GB big virtual disk where Windows 7 wil live. You can specify a different size if you want. Once it's done creating it, you attach it to the installer by typing:
Code:
select vdisk file="C:\mywin7test.vhd"
attach vdisk
You can then exit DiskPart by typing "exit" and close the command prompt. Now, click "Install now" and then "Custom (advanced)".
In the list of partitions it shows you, pick the one that is really our new virtual disk. You can probably tell by looking at the size and seeing if it's 20GB. Most likely it will be the last item in the list. If you see a message at the bottom saying that Windows can't be installed on this disk, just ignore it and hit Next, it'll still work.
From here on the install is no different from if you had installed it on an actual partition. When it's done, you'll get a new boot menu with the items "Windows 7" and "Earlier version of Windows". The first is your new Windows 7 installation while the latter will be your "real" OS.