Guild Wars 2

I just purchased the game today. Hit the download button on the site and went to open the GW2setup and when i double click it asks for permission. I hit yes then it comes with a popup saying Guild Wars 2 in header following by “Installation Cannot Be Completed. Please Contact Support” I submitted ticket w Game Advisor but dont understand what i could be. I would like to be able to get my money back if I cant even install the game. Any advice would be appreciated.

Windows 7 64 Bit
GTS 450
Intel i7 w 4 GB ram clocked @ 3.07 GHZ

You may need to run the installer in administration mode, also disable any anti virus you have running

Yea ive tried right clicking and chose Run As Administrator that didnt work and i have tried disabling Antivirus. Still same error.

ESET NOD32 Antivirus

What is the error you are getting that might help.

There is no error message just a dialog box as follows

Guild Wars 2
“Installation Cannot Be Completed. Please Contact Support”

Thats all it says.

Update

So i uninstalled the installer. Then reinstalled. Now i double click and it pauses like its about to load but nothing happens. I think try to double click the icon again and now i get the dialog box as seen before. I press Ctrl + alt+ Del and look and its no in applications but GW2Setup is running in processes but i dont see the physical application. I try to delete the file from the download folder and it says cant be deleted because it is in use by Guild Wars 2 Game Client. Very confused now. Its almost as if its running in the background somewhere. Still need help.

Update
So i just went and tried random thing and it worked. Changed name of installer file to GW2.exe. Client opened immediately and went to login screen. WTF?!?!?