"This site is blocked" by McAfee

I'm setting up a jotform for my friends to provide me feedback. The form is OK on my computer; however, some of my friends come across this error message. Could you help me resolve?

I tried using https://form.jotform.com/ and https://secure.jotform.com/ but both did not work.

I have checked link that you provided and it seems that you have deleted your form. 

From what I was able to find on internet this issue is related to McAfee and Internet Explorer. 

Maybe this articles can help you to resolve your issue: 

http://classroom.synonym.com/unblock-things-mcafee-11685.html 

https://community.mcafee.com/thread/35581?tstart=0 

Feel free to contact us if you have any other questions.