Should I block it?
No, this file is 100% safe to run.
 
     
    
        mf.dll
Media Foundation-DLL by Microsoft
| Version: | 12.0.7600.16385 (win7_rtm.090713-1255) | 
| MD5: | e3dcdd8e00d44928bd1f8da34b5347c4 | 
| SHA1: | 3843cce219f78667a5e10f5a1f39eeee7e8631db | 
This is a Windows system installed file with Windows File Protection (WFP) enabled.
Overview
mf.dll is loaded as dynamic link library that runs in the context of a process. The assembly utilizes the .NET run-time framework (which is required to be installed on the PC). This version is designed to run on Windows 7.
 Details
Details
| File name: | mf.dll | 
| Publisher: | Microsoft Corporation | 
| Product name: | Media Foundation-DLL | 
| Description: | Betriebssystem Microsoft® Windows® | 
| Typical file path: | C:\Windows\System32\mf.dll | 
| Original name: | mf.dll.mui | 
| File version: | 12.0.7600.16385 (win7_rtm.090713-1255) | 
| Product version: | 12.0.7600.16385 | 
| Size: | 3.93 MB (4,120,064 bytes) | 
| Build date: | 4/24/2012 7:12 AM | 
| Digital DNA | 
| File packed: | No | 
| Code language: | Microsoft Visual C# / Basic .NET | 
| .NET CLR: | Yes | 
| .NET NGENed: | No | 
More details
 Behaviors
Behaviors
Approved shell extension
Located in the registry at 'SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved'
- 'MF ADTS Property Handler' with CLSID {80009818-f38f-4af1-87b5-eadab9433e58}
 Distribution by Windows OS
Distribution by Windows OS
| OS version | distribution | 
| Windows 7 Home Premium | 100.00% |  | 
 Distribution by PC manufacturer
Distribution by PC manufacturer
| PC Manufacturer | distribution | 
| Toshiba | 100.00% |  |