Vista - .NET Framework Problems

Everytime I try to open a game or something requiring .NET Framework I get this error message:

To run this application you need to install one of the following applications:

.NET Framework v2.0.50727

I already installed this, and it errored, and it did not appear on my add/remove so I couldn't uninstall it. So I tried deleting it manually through the Framework folder, which Vista won't allow me permission to do. So i did the next best thing and ripped it out onto my desktop. I tried to reinstall and the installer claims that 2.0.5 is already installed, and I can't even reinstall 1.0 or 1.1 because it errors, and I can't install 3.5 because it thinks there's a prior version. So now i'm stuck with three folders on my desktop I can't delete, no .NET Framework and seemingly no way of getting it. What do I do?

Cypher17 wrote:You're too dangerous, huh?

<http://uksbsguy.com/blogs/doverton/archive/2008/02/01/how-to-repair-the-net-framework-2-0-and-3-0-on-windows-vista.aspx>

<http://www.howtogeek.com/howto/windows-vista/enable-the-hidden-administrator-account-on-windows-vista/>

<http://vistasupport.mvps.org/repair_a_vista_installation_using_the_upgrade_option_of_the_vista_dvd.htm>