Microsoft has issued out of the band patch for Windows 8.1 and Windows Server 2012 R2. The update resolves the Remote Access Elevation of Privilege vulnerability, and should be installed on all devices.
Besides cumulative updates, Microsoft today released its monthly rollup updates for Windows 8.1 and Windows 7. Traditionally, there are monthly rollup updates and a security-only updates. The latter ones need to be installed manually when needed, while the rollup package gets installed automatically via the Windows Update.
The original version of Windows 8.1 was released in October 2013. Since then, Microsoft has released a few major updates for the Windows 8.1 platform, including Update 1 (April 2014), Update 2 (August 2014), Update 3 (November 2014) and subsequently a bunch of cumulative rollups, including security fixes and stability improvements. Windows 8.1 has exited mainstream support on January 9, 2018.
A critical flaw was found in all Intel processors launched in the past decade. The vulnerability can allow an attacker to gain access to protected kernel memory. This chip-level security flaw cannot be fixed with a CPU microcode (software) update. Instead, it requires modification of the OS kernel. Earlier today, Microsoft released security patches for Windows 10. The appropriate patches are now available for Windows 7 and Windows 8.1.
Besides the updates for all versions of Windows 10, the Redmond software giant today released a number of updates for the previous versions of the OS. The appropriate update packages are now available for Windows 7, Windows 8.1, Windows Server 2012, Windows Server 2008 R2 SP1, and Windows Server 2012 R2.
A number of Winaero readers write to me regularly saying they have various shutdown-related issues with Windows 10. The most popular issue is that their PC reboots instead of shutting down. When they click shut down, Windows 10 doesn't shutdown, but instead restarts.
If you recently bought a new PC or assembled one yourself with a new CPU and decided to install Windows 7 or Windows 8.1 on it, you will not be able to update these operating systems. Microsoft is not going to deliver updates for you any more. This was recently announced. A newly released set of patches brings the CPU detection feature to Windows 7 and Windows 8.1.
These days, most mainstream browsers do not support Windows XP and Windows Vista operating systems. Once Microsoft ended their official support, many vendors did the same. For example, Chrome doesn't support them, but Firefox still does. Mozilla today shared details of their plans for Windows XP and Windows Vista.