A Microsoft engineer writing on the same forum said the company was
investigating users' problems, but downplayed them as "isolated issues."
Users began posting messages about the endless reboots Friday, saying that
the Windows 7 installation would hang two-thirds through the upgrade. They
reported a message on their machines that claimed the upgrade had been
unsuccessful and that Vista would be restored. Instead, their PCs again booted
to the Windows 7 setup process, failed, then restarted the cycle
Sunday afternoon, a support engineer named "Keith" said that some users'
problems may be related to the optical drive speed when creating an install DVD
from a disk image downloaded from the Microsoft store or through Digital River.
"Make sure you are burning the image at the slowest speed possible to avoid
corruption on the installation disc," said Keith.