Microsoft (MSFT) has reissued a security update that initially dropped the dreaded Blue Screen of Death (BSoD) on some users, two weeks after removing the buggy patch and advising those affected to uninstall it.

Shortly after Microsoft on Aug. 12 issued update MS14-045, a fix to address a vulnerability in a media library, users began reporting that the new software crippled their Windows 7 systems with the dreaded BSoD. But Microsoft didn’t do anything about it until three days after the initial Patch Tuesday fix was posted.

Finally, at its Security Tech Center Web page, Microsoft amended a security bulletin, saying it is “investigating behavior associated with the installation of this update, and will update this bulletin when more information becomes available. Microsoft recommends that customers uninstall this update.”

Now, the vendor has reissued the fixed security update as Bulletin MS14-045 on its Security Tech Center website. User instructions also are included for applying the update.

“A small number of customers experienced problems with a few of the updates,” wrote Tracey Pretorius, Microsoft Trustworthy Computing director, on the vendor’s Security Response Center blog. “As soon as we became aware of some problems, we began a review and then immediately pulled the problematic updates, making these unavailable to download. We then began working on a plan to rerelease the affected updates,” she said.

“Today, we rereleased Security Bulletin MS14-045 to address kernel-mode driver issues,” Pretorius wrote. “We encourage customers to install the security update as soon as possible.”

Pretorius went on to explain that users with Windows Update installed will have the updated software automatically applied to their system.

While it’s impossible to know exactly how many computers blue-screened owing to the faulty update, ComputerWorld reported that as of Aug. 17, nearly 400 messages had been posted on Microsoft’s support forum on the issue with more than 50,000 views.