Microsoft offers a free 90-day evaluation version of Windows 8.1 Enterprise edition just as it did with Windows 8.
On the fence about Windows 8.1? You can take the new OS for a free 90-day spin before deciding whether you want a permanent relationship.
For Windows 8
users, the decision to upgrade to 8.1 is virtually a no brainer. The new version offers a host of benefits and improvements over its predecessor. And it's free. So, there's little reason not to upgrade. Windows 8 users can easily download and install the Windows 8.1 update through the Windows store