Two updates were beset by technical issues, forcing Microsoft to issue another update to remove the faulty software.
Data loss security woes
The flaw -- uncovered by IBM researchers in May and patched by Microsoft on Tuesday -- affected every version of Microsoft's desktop OS since Windows 95.
Users of Windows and other Microsoft software will receive a slew of updates on Tuesday, including five rated as critical.
Monthly security update addresses two dozen vulnerabilities, including one being exploited as part of the "Sandworm" cyberattack.
Apple just released a patch for Shellshock, a bug that could give hackers access to Macintosh computers, but a security specialist says Apple fixed only two out of three security holes.
The company said previously that the vast majority of Macs were "safe by default" from the new security vulnerability known as the Bash or Shellshock bug.
The pace of performance increases has slowed among the world's fastest supercomputers, while China now has nearly as many as the UK, France, and Germany combined.
To snag Microsoft's June patches and later ones, Windows 8.1 users better make sure they've installed the April update.
The Web infrastructure company's patch was supposed to have handled the problem. Turns out it protects only three of six critical encryption values.