Microsoft .NET Framework Version 2.0 is required to continue even though windows 7 has this technology built in.

The .Net Framework 2.0. error is associated with hardware drivers not being compatible with windows 7, typically printer drivers after a windows 7 upgrade are still associated with the previous OS.............

Go to your printer or other hardware manufactures site to download and install windows 7 drivers for your hardware this should eliminate the 2.0 error. You might also need to uninstall the old driver first.