Rpcrt4.dll errors are caused by situations that lead to the removal or corruption of the rpcrt4 DLL file. In some cases, rpcrt4.dll errors can indicate a registry problem, a virus or malware issue, or even a hardware failure.

Follow these steps in the order presented to try the most likely solutions first.

Recover rpcrt4.dll from Recycle Bin. The simplest possible cause of a "missing" rpcrt4.dll file is that you accidentally deleted it.

If you suspect this, but you've already emptied the Recycle Bin, you may be able to recover the file with a free file recovery program.