What is a0000191.dll, and how to fix the problem
a0000191.dll error solution illustrates the definition of a0000191.dll, and provide you a possibility to run a scan if you are troubled by this process.

a0000191.dll General Information

Process Name: Microsoft MPEG-4 Video Codec

Application using this process: Microsoft MPEG-4 Video Codec

Software Description:

This is a process dealing with Microsoft MPEG-4 Video Codec and is still being reviewed so no information is available for it at this stage. However it is known to be a non essential process so need not be installed on your computer.


Non-system processes like a0000191.dll originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you .

Security & Performance

Scan a0000191.dll Errors: Scan and Check the Process Now

Security risk: N/A
Spyware: N/A (Scan and Check the Process Now)
Virus: N/A (Scan and Check the Process Now)
Trojan: N/A (Scan and Check the Process Now)

Can I stop or remove a0000191.dll?

Most non-system processes that are running can be stopped because they are not involved in running your operating system. Scan your system now to identify unused processes that are using up valuable resources. a0000191.dll is used by 'Microsoft MPEG-4 Video Codec'. To stop a0000191.dll permanently uninstall 'Microsoft MPEG-4 Video Codec' from your system. Uninstalling applications can leave invalid registry entries, accumulating over time. Run a free scan to find out how to optimize software and system performance.

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Note: a0000191.dll may be disguised by spyware, malware, virus and Trojan, if you find you didn't install that software, it must be virus. The virus may slow down computer performance, system crashes, data loss and privacy leakiness. We recommend you to run a Free security a0000191.dll scan and remove a0000191.dll Virus in your computer.

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