Oleaut32.dll errors are caused by situations that lead to the deletion or corruption of the oleaut32 DLL file. In some cases, these errors can indicate a registry problem, a virus or malware issue, or even a hardware failure.

Recover oleaut32.dll from Recycle Bin The simplest possible cause of a "missing" oleaut32.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.

Run a virus/malware scan of your entire system. Some oleaut32.dll errors could be related to a virus or other malware infection on your computer that has corrupted the DLL file. It's even possible that the error you're seeing is related to a hostile program that is masquerading as the file.