Microsoft has expelled a proxy program put together for a bug in its Internet Explorer web browser.
Cybercriminals used the smirch to setup the Poison Ivy trojan on users' computers.
This square of malware can rob information or take remote manage of a PC.
Microsoft mentioned in a blog the Fix It apparatus was "an easy, one-click answer that will help safeguard your P.C. correct away" but "not expected to be a deputy for any safety update".
Microsoft mentioned there had been an "extremely paltry number of attacks".
Before releasing the fix, the firm had referred to workarounds such as disabling Active X controls and Active Scripting or downloading its Enhanced Mitigation Experience Toolkit.
Another idea had been to change the security-zone settings on the browser to "high" and run IE in a restricted mode.
So-called zero-day, or newly discovered, vulnerabilities are rare. According to safety firm Symantec, usually 8 such bugs were speckled in 2011.
Symantec investigate executive Liam O Murchu mentioned their newness done them dangerous.
"Any time you see a zero-day similar to this, it is concerning," he said. "There are no rags available. It is really tough for people to safeguard themselves."
The flaw, present in all versions of Internet Explorer solely IE 10, was speckled by Luxembourg-based safety consultant Eric Romang, when his Personal Computer was putrescent by Poison Ivy final week.
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