Every second Tuesday of the month, Microsoft releases a number of security software updates. This upcoming Tuesday will be no exception and today, the company posted its summary of its security patch that will be released on April 9th, also known as Patch Tuesday.
Nine security bulletins will be issued on that day, and two of them will be labeled as "Critical". The summary of the security announcements reveals that one of the critical bulletins concerns Internet Explorer and it affects IE6, 7, and 8 in Windows XP, IE7, 8 and 9 in Windows Vista, IE8, 9 and 10 in Windows 7 and IE10 in Windows 8 and RT.
The other critical update to be released on Tuesday is for Windows XP Service Pack 3, along with Windows Vista Service Pack 2, and Windows 7. This critical update does not affect Windows 8 or RT. As usual, Microsoft has not gone into detail on the specifics behind these updates so as to not alert hackers beforehand but will release that information after the patches are launched on Tuesday.
Microsoft will almost certainly issue non-security related software updates for other products on Tuesday, such as software fixes and improvements for its Surface RT and Surface Pro PCs.
Source: Microsoft Security page