Reinstalled Windows XP ( FRESH RESTART ) HELP WITH HORIZON

I have Horizon downloaded but when I click Horizon.exe It comes up with an error as in unable to open.
What am I missing that reaches it’s specs? Before I FRESH RE-INSTALLED XP it worked fine.
Help would be great :smiley:

do you try to disable your AV some AV don’t let Horizon open so try to disable the AV and download the latest Version of Horizon

install .net framework 3.5