Microsoft Corp issued its biggest-ever security fix on Tuesday, including repairs to its ubiquitous Windows operating system and Internet browser for flaws that could let hackers take control of a PC.
The new patches aim to fix a number of vulnerabilities including the notorious Stuxnet virus that attacked an Iranian nuclear power plant and other industrial control systems around the world.
Microsoft said four of the new patches - software updates that write over glitches - were of the highest priority and should be deployed immediately to protect users from potential criminal attacks on the Windows operating systems.