If not, uninstall them all then after a reboot see if Windows Update offers them again.
Any software that needs .Net Framework will tell you what it needs.
Dell Dimension 3000
I downloaded and installed most of the Dell drivers and Windows Updates are succeeding except for the ones pertaining to .NET Framework, which simply say "failed" then lists them in Updates Not Installed. When I tried installing the .NET Framework from CD instead it gave me a message saying that newer versions of the install were already in place. Do I have to uninstall the newer version of .NET Framework in order to go through Windows Updates in order and proceed, and if so how do I uninstall it?