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Should I remove Microsoft .NET Framework SP1?

What percent of users and experts removed it?
6% remove it94% keep it
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Global Rank #45,678
Reach 0.0018%


3.5.30729 5.56%

Other programs by Microsoft

Microsoft .NET Framework 3.5 SP1

What is Microsoft .NET Framework SP1?

The Client Profile is used to run most client applications that target the .NET Framework 3.5. The .NET Framework is a software framework that includes a large library and provides language interoperability across several programming languages. Programs written for the .NET Framework execute in a software environment, known as the Common Language Runtime, an application virtual machine that provides services such as security, memory management, and exception handling. The class library and the CLR together constitute the .NET Framework. As with .NET Framework 3.0, version 3.5 uses the CLR of version 2.0. In addition, it installs .NET Framework 2.0 SP1, (installs .NET Framework 2.0 SP2 with 3.5 SP1) and .NET Framework 3.0 SP1 (installs .NET Framework 3.0 SP2 with 3.5 SP1), which adds some methods and properties to the BCL classes in version 2.0 which are required for version 3.5 features such as Language Integrated Query (LINQ). The .NET Framework 3.5 Service Pack 1 was released on 11 August 2008. This release adds new functionality and provides performance improvements under certain conditions, especially with WPF where 20–45% improvements are expected. Two new data service components have been added, the ADO.NET Entity Framework and ADO.NET Data Services.


The software installer includes 13 files.

Program detailsProgram details

URL: www.microsoft.com/en-us/download/details.aspx?id=21
Installation folder: C:\WINDOWS\Microsoft.NET\Framework\v3.5\
Uninstaller: C:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft .NET Framework 3.5 SP1\setup.exe

Program filesFiles installed by Microsoft .NET Framework 3.5 SP1

  • AddInProcess.exe
  • AddInProcess32.exe
  • AddInUtil.exe
  • csc.exe
  • DataSvcUtil.exe
  • EdmGen.exe
  • Microsoft.Build.Tasks.v3.5.dll
  • Microsoft.Data.Entity.Build.Tasks.dll
  • Microsoft.VisualC.STLCLR.dll
  • MSBuild.exe
  • Sentinel.v3.5Client.dll
  • vbc.exe
  • WFServicesReg.exe

How do I remove Microsoft .NET Framework SP1?

You can uninstall Microsoft .NET Framework SP1 from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8/10: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program Microsoft .NET Framework 3.5 SP1, click it, and then do one of the following:
    • Windows Vista/7/8/10: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove Microsoft .NET Framework SP1.

Uninstall it 6%
Keep it 94%
PC installation base

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows XP 76.19%
Windows Vista 23.81%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Dell 21.05%
Lenovo 15.79%
American Megatrends 10.53%
Sahara 10.53%
Acer 5.26%
ASUS 5.26%
Toshiba 5.26%
Hewlett-Packard 5.26%

About Microsoft

Microsoft Corporation develops, manufactures, licenses and supports a variety of products and services related to computing.
Publisher URL: www.microsoft.com


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