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I have visual studio 2010 express installed on my pc and I require windows phone sdk for which I need to install VS 2010 sp1. But the installation fails every time I run showing an error code 0x800C0005.I searched the error and almost all forums would guide me to register some dll files many of which when registered show errors like 'file could not be loaded' or 'the call to DllRegisterServer failed with error code 0x80004005'. Please guide me if I am going wrong here or if there is any other way to install windows phone sdk or VS 2010 SP1.Thanks in advance.
Posted 7-Jan-13 3:43am
Updated 7-Jan-13 3:44am
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Solution 1

There is a pretty good answer over here on the MSDN Forums: MSDN Clickey[^]

The crux of the answer is:
According to the description of your problem, you failed to install Visual Studio 2010 Service Pack 1.

The error 0x800c0005 may occur if certain dynamic-link library files (.dll files) are not registered correctly or if there is a firewall between the computer and the Internet that does not allow HTTPS (SSL) connections.

Here are my suggestions:

  • Please download the ISO files of Visual Studio 2010 Service Pack 1 from:
    Since I find that you installed Visual Studio 2010 Service Pack 1 via a web installer, I recommend you download ISO file and install it.

  • Extract the ISO files to your local hard disk.

  • Complete or dismiss Windows Updates before installation (but turn on Windows Update service).

  • Clean up your “%temp%” folder (Start>>Run>>%temp%).

  • Check if there are any anti-virus or antispyware applications running. Make sure they are turned off during installation.

  • Run the setup file with Administrator privileges: Right-click the installer > Run as administrator.

Sandeep Mewara 7-Jan-13 11:10am
My 5!
Marcus Kramer 7-Jan-13 11:49am
Thanks, Sandeep.
Sandeep Mewara 7-Jan-13 11:53am
BTW, congrats for your MVP status. You deserve it. :)
Marcus Kramer 7-Jan-13 12:01pm
Thanks, Sandeep
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Solution 2

My understanding is that VS2010SP1 does not update Visual Studio 2010 Express. I think you have to install a paid version of VS2010 to get the SP1 update.
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Solution 3

On a little more research,I found that my college lan was blocking the update,arranged an alternative for it and it worked out.

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