Trend Micro Windows 10 Upgrade
Antivirus updates issued by Trend Micro Inc. on Friday crippled Windows XP and Vista PCs when they mistook several critical system files for malware, and blocked access to those files.
Some users have yet to regain control of their PCs, according to e-mail sent to Computerworld.
Two signature updates that Trend Micro released Friday for its most popular consumer security software incorrectly identified up to eight different Windows files as Trojans, then quarantined those files, thinking they were dangerous. The updates were issued to users running Trend Micro's AntiVirus plus AntiSpyware 2008, Internet Security 2008 and Internet Security Pro 2008.
In some cases, quarantining the files prevented the PC from booting.
Trend Micro acknowledged the snafu, but said the buggy updates were out for only a short time. "For a brief period of time late last week, primarily some continental European consumers were affected by a Trend Micro pattern-file update with a false positive that could have led to quarantining a few Windows components," said company spokeswoman Andrea Mueller in an e-mail.
When it realized that the updates were flagging innocent files, Trend Micro issued a replacement signature update.
That was too late for some users, however.
"I have spent a lot of hours to fix this issue, also with a long phone call with [Trend Micro] support this afternoon," said Bruno Misonne from Belgium in an e-mail to Computerworld.
Misonne said two PCs, one running Vista and the other XP, were affected by the faulty update. He was able to restore the Vista system, but had been unable to recover the XP machine. "Technical support told me that they are overfilled with cases," he said in a follow-up e-mail. "This bad signature simply removes essential files."
Trend Micro has published a detailed support document for users whose antivirus software downloaded and installed the flawed updates. The document includes step-by-step instructions for users who are unable to boot their PCs that requires them to use Windows' Safe Mode to regain control, then asks them to download and run a restore utility that moves the system files out of quarantine and to their proper locations.
This isn't the first time that Trend Micro has pushed a malicious signature update to its customers. In April 2005, the company issued a buggy definition file that locked up Windows XP machines, most of them owned by Japanese users, as the software consumed 100% of the processor's cycles.
Last year, an antivirus signature released by rival Symantec Corp. knocked out thousands of Chinese PCsby falsely labeling two Windows .dll files as malware, preventing users from booting their computers.
Trend Micro Minimum Requirement:
Processor -
800 MHz (1 GHz recommended) for the Windows Vista Family
800 MHz (1 GHz recommended) for the Windows 7 Family
1 GHz for the Windows 8 Family
1 GHz for the Windows 8.1 Family
1 GHz for the Windows 10 Family
Memory -
512 MB (1 GB recommended) for the Windows Vista Family
1 GB for the Windows 7 32-bit Family
2 GB for the Windows 7 64-bit Family
1 GB for the Windows 8 32-bit Family
2 GB for the Windows 8 64-bit Family
1 GB for the Windows 8.1 32-bit Family
2 GB for the Windows 8.1 64-bit Family
2 GB for the Windows 10 Family
Operating system -
Windows 8 Family (32 or 64-bit)
Windows 8.1 Family (32 or 64-bit)
Windows 10 Family (32 or 64-bit)
Web browser -
MicrosoftInternet Explorer (The newest version of Internet Explorer)
MicrosoftEdge
Mozilla Firefox 32-bit (The newest version and the most recent previous version of Mozilla Firefox)
Google Chrome (The newest version and the most recent previous version of Google Chrome)
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