Microsoft is investigating problems in Outlook Express caused by a security patch issued earlier this month.
The security update MS06-016 was released to patch a vulnerability that could allow hackers to take control of users’ computers. It was issued on 11 April as part of Microsoft’s regular monthly patching cycle.
But problems with Outlook functions have been reported in a slew of postings on Microsoft’s help and support newsgroup messageboards, including address books disappearing after the update was applied, disabled “send” functions and template problems.
A spokesperson said, “Microsoft is investigating reports that some customers who have deployed security update MS06-016 may be experiencing issues with certain functions in Outlook Express.”
The software giant would provide “customer guidance as necessary” when its investigation was complete, the spokesperson said.
The Outlook patch problems follow a warning from Microsoft earlier this week that its critical security patch for Windows Explorer could crash Office applications or prevent access to files and folders.
The software firm had already been criticised for delaying its release of a security patch for the Explorer vulnerability, when hackers were already circulating code to exploit the bug.