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If you want to remove microsoft net framework 3 0-3. exe from your computer, just go to Start > Control Panel > Add/Remove programs and select Microsoft .NET Framework 3.0 from the list.
If you have any problems with microsoft net framework 3 0-3. exe, you may try using a registry cleaner or a speed-up software to check, analyze, and fix problems that are affecting the performance of your computer.
You may try contacting Microsoft Corporation, the developer of microsoft net framework 3 0-3. exe and ask for more information.