A Windows update that occurred several years ago can cause this issue. The only option is to upgrade to the aspx version. The latest version of the product https://www.precisionid.com/products/barcode-generators/asp-net-1d/
is an aspx file instead of an asp file and it works well with the latest updates. If you would like to upgrade please post a private, separate incident with your old order ID and we can provide you 50% off the current price.