Microsoft CEO Steve Ballmer has announced that the company would launch tablet devices running the Windows 7 operating system.

Ballmer said in his speech at the firm's annual World Partner Conference that Dell, Samsung, Toshiba, Sony and Asus were some of the manufacturers that were working on Windows slate PCs. However, he didn't mention the precise date for the launch of tablet devices running the Windows 7 OS.

Speaking on the topic, he said, "This year, one of the most important things that we will do in the smart device category is really push forward with Windows 7-based slates."

He also claimed that it sold 3 million units of the iPad within just 80 days of launch.

Meanwhile, Microsoft released a security update to patch five vulnerabilities in Windows and Office.

On the busiest single day, Microsoft researchers detected over 2,500 attacks. However, the figure is small, considering Windows' huge user-base. But, the company and its security experts said they were worried about this flaw as it was being exploited for more than a month.

There were four security updates that included fixes for five different flaws. All of the five vulnerabilities fixed by the security updates were rated critical.