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What is rapi.dll? It's lost. How do I restore it?

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Rapi.dll is the Microsoft Corporation running process for Mobile Device Remote API. If your system detects its absence, here is what you can do. Firstly, if you remember that you have deleted the file by yourself, look for it in Recycle Bin or use a file recovering software, such as Recuva Data Recovery. Use the System Restore option to rollback your computer to a previous date(Start> All Programs> Accessories> System Tools> System Restore). The missing files might be caused by a virus or malware infection, so it is a good idea to fully scan your computer with an up-to-date antivirus. If the error appears when you use are using a certain program, reinstalling the application will restore the missing dll.

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answered by (620 points)

Rapi.dll is a dynamic link library for Mobile Device Remote API. It is shared by many applications on your computer. If the file is missing or outdated, you won’t be able to start the applications that load this module.If the file is missing, you can download a copy of it from the Internet or get on from another working machine that has the same operating system. Or re-install the related program or fix the system registry to fix Rapi.dll error.

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