The MS14-045 updating (Vulnerabilities in Kernel-Mode Drivers Could Allow Elevation of Privilege) corrects three vulnerabilities like Elevation of Privelege in system drivers of all supported Windows versions. It is about correction of drivers of subsystem of Windows (win32k.sys) and DirectX (Dxgkrnl.sys). Users to the set updating can have constant BSODY, besides at Windows normal work with fonts (their wrong display) can be broken.
After you install this security update, fonts that are installed in a location other than the default fonts directory (%windir % \fonts \) cannot be changed when they are loaded into any active session. Attempts to change, replace, or delete these fonts will be blocked, and a? File in use? message will be presented.
If you have faced this problem use instructions of the section Mitigations in this article of support of the company (reset in the safe mode will be required).
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