With the arrival of Diablo IV just around the corner, there is no better time to blow the dust off the first Diablo game to experience the original story.
If you trust your file and its source, and you think your antivirus has mistakenly recognized it as a potential threat you can add it to your antivirus’ whitelist so your future access to the file isn’t blocked. This way, you can keep your antivirus enabled while still keeping your access to the file open.