Won't work

I have downloaded and uninstalled and reinstalled horizon repeatedly but the program will not open. i have the newest version and i have it allowed in my firewall and have no AV’s installed. I have microsoft .net framework 4. I have also unblocked the setup file before installing and i have selected properties once installed and gone to security and made sure all boxes were checked. Please help me. I’ve been trying to resolve this issue for a few days now.

When I try to open it I get a message saying “Horizon failed to open” and am given the option to close program or check online for solution and close program. Any help would be awesome. Thanks. I have also tried everything I could find when google searching to fix it.

You should try installing .Net Framework 3.5, get it here: http://www.microsoft.com/en-us/download/details.aspx?id=21

Also try reinstalling Horizon after downloading it from here: https://www.horizonmb.com/client/v2/latest.php