[quote name='LinkinPrime']Just downloaded the beta client for the open weekend beta and it won't install. Is that normal because the beta isn't live yet, or do I have a problem on my PC?

s[/QUOTE]
here try this it worked well for me,all credit goes to E1d on the D3 forums:
Create a folder called Diablo III Beta wherever you want your game to be (Not in the Program Files folder)
Download the Diablo III Beta core files 0.9.0.8896 from:
http://www.gamefront.com/files/21478929/Diablo_III_Beta_core_files_8896_zip
Open the zip and extract the files to the Diablo III Beta folder you created
*You probably dont need this next step because you should already have the Agent and Launcher on your system.
Still, if you dont, download and install the Agent and the Blizzard Launcher from this website:
http://patchup.info/tools/Win/
Now set the Diablo III Beta Launcher.exe to be started in WinXP compatibility mode and start the Launcher.
You should only do this if you feel comfortable enough in accepting other player's suggestions. Or you could simply wait until this issue is fixed to install the game.
When using this method, if you delete the Battle.net folder or attempt to run the launcher without having the Agent/BlizzLauncher you will get an error saying Failed to Extract Required Files. The reason you'd get this is because that zip is missing a fille called SetupWin.mpq, which I could upload later if you want.
BTW, while writing this, I downloaded those files and *installed* the game using this method in this computer, which did not have Diablo III installed, and it seems to be working.