Wow. Amazon currently has an Upgrade to Microsoft Windows 8 Pro for just $54.99 (down from $199.99)! Plus, it looks like you also might be able to score a free $25 Amazon credit!?! Just look for this box:
Here are some details about this upgrade:
If you currently have a personal computer running Windows 7, Windows XP or Windows Vista then you can upgrade to Windows 8 Pro (Professional). With Windows 8 Pro, you can connect and share your files. Windows 8 Pro also adds enhanced features if you need to connect to company networks, access remote files, encrypt sensitive data, and other more advanced tasks.
The new Windows 8 start screen is your personalized home for items you use the most and can be customized according to your user preferences. Windows 8 Live tiles provide real-time updates from your Facebook, Twitter, and e-mail accounts. Along with the new Start screen, the lock screen now includes e-mail, calendar, and clock widgets.
Please keep in mind that Amazon prices can change very quickly, so I cannot guarantee how long this deal will stick around.
(Thanks Savings Lifestyle!)