What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I have checked our widgets and apps and did not find anything that will help you to do that, currently our File Upload field does not allow to upload .exe files which can be an auto-executable file and it can install a virus in your PC.
I would suggest you to scan each file that is uploaded on your form, scan all the files you download and make sure you have your anti-virus up to date so you will avoid to get a virus installed.