I recently installed Windows 8 on my PC and was attempting to join it to our corporate domain but was unable. The 'Domain' button and field in the 'Member of' group were greyed out and unselectable (Figure 1 below).
- As a first step, make sure the that Workstation is running (Figure 2 below). If its running, restart it and confirm the domain is still not working
- Check the version of Windows 8 (Figure 3 below)
- If it just says Windows 8 (like highlighted in Figure 3), thats the issue. Windows 8 'Home' edition can't join networks.
If you buy your key through that tool, the system will automatically install new features and restart a few times.
NOTE: Make sure that you have a Windows 8 bootable media device before going any further. I encountered a variety of issues in the earlier versions of this product causing errors that prevented boot up of the OS without the ability to access the advanced boot options.
<!--7/17/2015 NOTE: This post was from 2012. The below isn't really valid anymore but retaining it for historical purposes-->
If you buy your key, you can enter a promo code to get the upgrade price of $40 or less instead of $70. Even though I had a valid Windows 7 key, I could not enter a promo code (the original Windows 7 key) nor could I use a code from http://windowsupgradeoffer.com/ to lower the price. Neither codes worked for me so I paid full price. Full price is still an amazing deal for something you use every day. It's a solid piece of software.
You can actually buy Windows 8 Pro for $15 through windowsupgradeoffer.com without buying a new PC. I don't recommend it as its unethical but you can just fill out the personal information and pick out a PC Brand (Dell), name of retailer (Best Buy), and PC model (Latitude). Just make sure the Date of Purchase is within the required time frame for the offer. You'll get a promo code in your email within 4 hours and you can use that.