Why can't I restore files even when I have backup/restore privileges enabled?

Backup and restore privileges allow some, but not all, types of access checks to be bypassed.  Typically those are sufficient to allow a backup utility to restore data to even sensitive folders.  However, there are some exceptions to that.  For example, at the time of this writing, much of the contents under %programfiles%\WindowsApps out of the…


Hotfixes and Patches for Windows for July 2015

Hey SDK friends, Jeff here with the July 2015 Hotfix List 3070714 “0x000000B8” Stop error during MPIO path failover in Windows Server 2008 R2 SP1 3060682 “The specified server cannot perform the requested operation” error occurs when GPO backup is unsuccessful and dynamic updates are disabled in Windows Server 2012 R2  3061817 Windows 8.1 does…

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Troubleshooting "Access Denied" errors

Anyone who has used Windows has encountered the dreaded “Access Denied” error.  (AKA error code 5 or 0x5). This error typically implies you can’t do something like open or save a file.  The error implies that you have encountered some type of security issue. In the past, an “Access Denied” issue came down to 2 things…

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RunAs Verb (Process.Start) doesn't work from a LocalSystem .NET Service

The Process.Start method in System.Diagnostics is equivalent to CreateProcess() in Win32. If you want to  launch a process as a different user, in Win32 you either need to call CreateProcessAsUser,  CreateProcessWithLogonW or CreateProcessWithTokenW. In .NET using Process.Start, you can use the  “runas” verb to the same thing. If you have a .NET Service configured with the LocalSystem…

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How can my application work when UAC is enabled and fail when it is disabled?

Hello Everyone, My name is Frank Kim and I work in Developer Support.  My expertise is in Windows Security (Authorization + Authentication), Remote Desktop and Windows Services.  For my first blog post, I thought I would discuss an interesting issue encountered by several of my customers. User Access Control (UAC) was introduced in Windows VISTA to…

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Web application gets Access Denied accessing a Named Pipe.

Recently, I was troubleshooting a problem for one of my customers. A named pipe created by a native C application was not accessible by web client. The actual product is a convention Windows application which does IPC through named pipes. Both server and client for this were Windows applications. They were trying to extend the…

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Access denied on a Mutex

If you are in a situation where, one process creates a MUTEX with default security descriptor and other process running in the same user’s context is not able to access it. You might be facing the problem because of newly introduced integrity mechanism in Windows. Integrity level implemented as a SID and is defined in…

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SetWindowHookEx API with WH_JOURNALRECORD. This API fails with access denied (Error 5).

A while ago I came across a problem in which  SetWindowHookEx API with WH_JOURNALRECORD was failing with Access denied on Windows Vista. If you have the same problem you can do what I tried. 1)      Create and Embed an Application Manifest with Your Application. o   In our case we would need manifest with <requestedExecutionLevel level=”requireAdministrator”…