I bought myself a new notebook last Saturday, and installed a lot develop softwares on it.

But when I tried to install Visual Studio 2010, I got a error like this:

[code]

[08/06/13,23:08:05] Microsoft .NET Framework 4: [2] Error code -939523550 for this component is not recognized.
[08/06/13,23:08:05] Microsoft .NET Framework 4: [2] Component Microsoft .NET Framework 4 returned an unexpected value.
[08/06/13,23:08:08] VS70pgui: [2] DepCheck indicates Microsoft .NET Framework 4 is not installed.
[08/06/13,23:08:08] VS70pgui: [2] DepCheck indicates Microsoft Visual Studio Macro Tools was not attempted to be installed.
[08/06/13,23:08:09] VS70pgui: [2] DepCheck indicates TFS Object Model (x86) was not attempted to be installed.
[08/06/13,23:08:09] VS70pgui: [2] DepCheck indicates .NET Framework 4 Multi-Targeting Pack was not attempted to be installed.
[08/06/13,23:08:09] VS70pgui: [2] DepCheck indicates Microsoft Visual Studio 2010 Ultimate – ENU was not attempted to be installed.
[08/06/13,23:08:10] VS70pgui: [2] DepCheck indicates Microsoft Visual Studio 2010 Tools for Office Runtime (x86) was not attempted to be installed.
[08/06/13,23:08:10] VS70pgui: [2] DepCheck indicates Crystal Reports templates for Visual Studio 2010 was not attempted to be installed.
[08/06/13,23:08:10] VS70pgui: [2] DepCheck indicates Microsoft SQL Server Compact 3.5 SP2 (x86) ENU was not attempted to be installed.
[08/06/13,23:08:10] VS70pgui: [2] DepCheck indicates Visual Studio 2010 Tools for SQL Server Compact 3.5 SP2 ENU was not attempted to be installed.
[08/06/13,23:08:10] VS70pgui: [2] DepCheck indicates Microsoft Sync Framework Runtime v1.0 (x86) ENU was not attempted to be installed.
[08/06/13,23:08:11] VS70pgui: [2] DepCheck indicates Microsoft Sync Services for ADO.NET v2.0 (x86) ENU was not attempted to be installed.
[08/06/13,23:08:11] VS70pgui: [2] DepCheck indicates Microsoft Sync Framework Services v1.0 (x86) ENU was not attempted to be installed.
[08/06/13,23:08:11] VS70pgui: [2] DepCheck indicates Microsoft Sync Framework SDK v1.0 (x86) ENU was not attempted to be installed.
[08/06/13,23:08:11] VS70pgui: [2] DepCheck indicates Microsoft Visual Studio 2010 Performance Collection Tools (x86) was not attempted to be installed.
[08/06/13,23:08:12] VS70pgui: [2] DepCheck indicates Microsoft SQL Publishing Wizard 1.4 was not attempted to be installed.
[08/06/13,23:08:12] VS70pgui: [2] DepCheck indicates Microsoft SQL Server System CLR Types was not attempted to be installed.
[08/06/13,23:08:12] VS70pgui: [2] DepCheck indicates Microsoft SQL Server 2008 R2 Management Objects was not attempted to be installed.
[08/06/13,23:08:13] VS70pgui: [2] DepCheck indicates Microsoft SQL Server 2008 R2 Data-Tier Application Framework was not attempted to be installed.
[08/06/13,23:08:13] VS70pgui: [2] DepCheck indicates Microsoft SQL Server 2008 R2 Data-Tier Application Project was not attempted to be installed.
[08/06/13,23:08:13] VS70pgui: [2] DepCheck indicates Microsoft SQL Server 2008 R2 Transact-SQL Language Service was not attempted to be installed.
[08/06/13,23:08:13] VS70pgui: [2] DepCheck indicates Microsoft Visual Studio 2010 ADO.NET Entity Framework Tools was not attempted to be installed.
[08/06/13,23:08:14] VS70pgui: [2] DepCheck indicates Microsoft Help Viewer 1.0 x86 was not attempted to be installed.

[/code]

After searched on Google, found a solution out which is :

1. Download  .NET Framework 4 from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=0a391abd-25c1-4fc0-919f-b21f31ab88b7 and install it separately.

2. After you have installed it, download .NET Framework Verification Tool to verify if .NET Framework are installed correctly on your machine or not. Click here: http://blogs.msdn.com/b/astebner/archive/2008/10/13/8999004.aspx

3. After you have installed it successfully, please run VS installer as Administrator and try to install it again.