Microsoft will put filters in place to make sure AMD-powered PCs susceptible to an "endless reboot" problem can't receive Windows XP Service Pack 3 (SP3) from the Windows Update service.
It marked the second time this month that Microsoft has had to bar some systems from obtaining the long-awaited service pack.
According to users who diagnosed the endless reboots -- and Microsoft when it first weighed in last week -- some computer makers made the mistake of using a disk image created on an Intel -based machine to factory-install Windows XP on hardware running AMD chips. Microsoft had advised computer makers against doing that as long ago as 2004.
Microsoft echoed HP in a message of its own on Thursday, but did not call out its OEM partner by name.
"We've determined this problem occurs on AMD-based machines with Windows XP images that were originally captured by an OEM on an Intel-based machine," said Microsoft in an anonymous post to its Micrososft Update team's blog . "The problem is a registry value, present on images created with Intel processors, that causes a driver (intelppm.sys) to load at boot. When intelppm.sys attempts to load on an AMD-based system upon the install of SP3, it causes a blue screen and the continuous reboot."
The same post acknowledged that engineers were working up a fix.
In the meantime, Microsoft will block AMD-based PCs which have the errant registry key from receiving XP SP3 through Windows Update (WU). "We're planning to add a filter to prevent Windows Update from offering SP3 to affected systems," the post continued.