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Windows® Internals, Sixth Edition, Part 1 by David A. Solomon Mark E. Russinovich and Alex Ionescu

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AppLocker

New to Windows 7 and Windows Server 2008/R2 (Enterprise and Ultimate editions) is a feature known as AppLocker, which allows an administrator to lockdown a system to prevent unauthorized programs from being run. Windows XP introduced Software Restriction Policies (SRP), which was the first step toward this capability, but SRP suffered from being difficult to manage, and it couldn’t be applied to specific users or groups. (All users were affected by SRP rules.) AppLocker is a replacement for SRP, and yet coexists alongside SRP, with AppLocker’s rules being stored separately from SRP’s rules. If both AppLocker and SRP rules are in the same Group Policy object (GPO), only the AppLocker rules will be applied. Another feature that makes AppLocker ...

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