Microsoft, in another attempt, is trying to close the privileges elevation hole in the NTFS file system's kernel driver for both Windows 7 and Server 2008. The new patch, 2840149, supersedes security update 2823324, which Microsoft released on its April Patch Tuesday.

Causing problems with third party programs, Microsoft had to recall the patch: It crippled computers and triggered error messages. It also caused problems with Kaspersky anti-virus, erroneously assuming that they no longer had a valid licence and discontinuing operation. When re-releasing the update, Microsoft didn't clarify whether this was the reason for the system malfunctioning.


The new patch is already being deployed via Windows Update. Microsoft is offering a bootable recovery disk as an ISO image to customers whose computers have failed to boot since the first patch was installed.