Symantec Anti-Virus Update Makes Some PCs Inoperable



A bug in an update of Symantec Corp's anti-virus software caused some Windows PCs to crash late this week, making machines inoperable until they were serviced in an embarrassing episode that angered some customers.

The company disclosed the problem on its website, saying that an update to its widely used Symantec Endpoint Protection 12.1 and Norton anti-virus software for businesses caused some PCs running Microsoft Windows XP software to crash repeatedly, showing what is known as the "blue screen of death."

The embarrassment comes at a challenging time for Symantec, whose shares have lost about a quarter of their value since it warned of a pending profit decline three months ago.

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