asked on

.NET Framework is incompatible with a previously installed one

on windows XP.
During installing dotnetfx2.exe
"
Microsoft cannot continue because this version of the .NET Framework is incompatible with a previously installed one. For more information see
http://support.microsoft.com/support/kb/articles/q312/5/00.asp
"
Can anyone help me to understand what is required from to do?

Forefront_Data_Solutions

It sounds like you have .Net v2.0 with Service Pack 1 installed. Because it is a later version, you cannot install an earlier version. You can try to un-install .NET v2.0 SP1, restart your computer, and then try installing. However, because you already have .NET v2.0 with SP1, do you really need to install the older version?

Jacques Bourgeois (James Burger)

Newer versions of the framework (4.0) install updated copies of older versions. Even if you do not see 2.0 in the Control Panel, an updated version could be "hidden" under 4.0. This could give the error you get.

Try the application first. It if works, then forget about it.

Even better, switch to a newer version of Visual Studio. The free Visual Studio 2010 Express can convert almost any older version source code to the 4.0 framework. And unless you needed some of the more advanced tools such as a class diagrams, the free edition will also enable you to maintain the code under the newer version.

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hassanwarraich

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