Hello. My name is***** can help you with your question.
This means that the file Diablo.exe is corrupt. It could also mean that you have malware on your system. I would suggest running a malware scanner like Malwarebytes. And if that does not resolve the problem you will have to uninstall Diablo, and then reinstall it again.
tried reinstalling the program-still comes up with same error message.
Please read the rest of my reply - let me know if you have done each of the steps.
tried to reinstall diablo and it came up with same error message. Tried malwarebytes but it wouldnt load-too slow downloading then stopped. need another solution-
That is all the more reason to run the malware scanner - this is an indication of malware - it will try to block the downloading of malware programs.
cant run malware scanner. setup wont load.need another solution.
The only other solution is to reload the operating system.