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"Kaspersky Lab apologizes for any inconvenience this has caused our customers," the company statement said. Neither company has explained the relationship between Kaspersky's program and the security update, but Kaspersky has issued a statement to its users. The switch to SHA-2 only for Windows 7 and Windows Server 2008 R2 users took effect on August 13 ('update Tuesday'), when Microsoft released its August security and quality updates for Windows. Microsoft has found a link between the flawed update and antivirus programs from Kaspersky Labs, which specializes in computer security products. Error messages varied, but users typically saw "The file system structure on the disk is corrupt and unusable," "The Session Manager Initialization system process terminated unexpectedly," or "Windows failed to start." Upon restarting their machines, many users found that Windows would not start, defaulting instead to the infamous blue screen of death.
#Windows server 2008 security update breaks windows update Patch#
The results of the patch created even more trouble. Although this issue was not critical by itself, some of the other problems that Patch Tuesday addressed were. The main vulnerability that this month's update addressed required a would-be hacker to possess valid login credentials and physically interact with a computer. The update came as a part of Patch Tuesday, Microsoft's longstanding tradition of releasing security patches on the second Tuesday of each month.