vvomble, you need to calm down or else no one is going to ever help you.
We can help you very easily if you give us a more in-depth issue.
What is your anti-virus? If you do not have Anti-Virus, do this;
First, click your Start Button, then click Control Panel.
From there, click on Windows Firewall;
Then head onto clicking "Allow a Program or Feature through windows Firewall.
Than allow Horizon it's as easy as that.
Here is where you can contact me; http://www.xboxmb.com/pm/newpm&u=91391
Also, if you have Avast!, use this tutorial on how to use Horizon with it;
First off, you want to go down to the lower Right-Hand corner of your screen. It should look some-what like this;
Right-Click the Avast! icon. The icon should look like this;
Once Right-Clicked, something should pop up like this;
Click on "avast! shields control". Something then should pop up looking like this;
When you are there, you can click on the time(s) you want to disable to firewall/anti-virus for so you can run Horizon.
Once you have clicked that, you should be prompted to disable it. It should look like this;
Just click "yes", then you can run Horizon.
You can keep Avast! but always do this to ensure that Horizon will work with-out getting an error on stat up.
If you didn't already, try getting .Net Framework 3.5 here if you do not have it; http://www.microsoft.com/en-us/downl....aspx?id=17851