Msxml4.dll errors are caused by situations that lead to the removal or corruption of the msxml4 DLL file. In some cases, msxml4.dll errors can indicate a registry problem, a virus or malware issue, or even a hardware failure.

Follow these steps in the order they are listed below to try the most likely solutions first.

Recover msxml4.dll from Recycle Bin The simplest possible cause of a "missing" msxml4.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 data recovery program.