Microsoft on Monday made its most aggressive move yet to convince customers to drop Windows XP and adopt Windows 7, telling them that there were only 1,000 days of support life left in the older operating system.

Stephen Rose, IT community manager for the Windows commercial team, noted the 1,000 days remaining for Windows XP support in a post to a Microsoft blog.

"Windows XP had an amazing run and millions of PC users are grateful for it. But it's time to move on," Rose said, adding that the operating system exits security support in "less than 1,000 days."

The 10-year-old XP actually has a little longer to live than that: Microsoft has promised to patch XP through April 8, 2014, 1,002 days from Monday.

"Bottom line, PCs running Windows XP will be vulnerable to security threats" after that date, said Rose. "Furthermore, many third-party software providers are not planning to extend support for their applications running on Windows XP, which translates to even more complexity, security risks, and ultimately, added management costs for your IT department."

Full story: Computerworld