I have tried to download from the website Revit 2011 3 times and it downloaded then when I tried to install it said that there was an "error" and that was it. I did the download for nothing. I had revit 2010 on my computer before but deleted it to make room for the 2011 version that I could not install. Now I am trying to get the 2010 version back but it say that it already exists. If there is any help that anyone can privide I would really appriciate it.