Microsoft is offering a free 90-day trial version of Windows 7 Enterprise, the Windows Vista successor due Oct. 22. But there's a catch.
Once the 90-day trial ends, users who want to continue using the OS will have to purchase a copy and perform a clean install, including drivers and applications.
Microsoft says testers can continue to use the trial after program ends, but warned that the OS will shutdown once-an-hour after the expiration date.
Potential trial users, should also be aware that members of the following MS programs already have access to the new OS: Partner Program, MSDN Subscribers (developers). TechNet Plus subcribers, and Volume License/Software Assurance customers. If you work for a large company, ask around before downloading.