unable to install visual studio 2008 sp1

I got following error

failed with error: 12180
WinHttpDownloader::GetProxySetting) Auto detection of proxy failed, try to retrieve proxy information via IE.
WinHttpDownloader::GetProxySettin开发者_开发知识库gViaIE) Retrieving proxy information using WinHttpGetIEProxyConfigForCurrentUser
WinHttpDownloader::GetProxySettingViaIE) Unable to retrieve Proxy information although WinHttpGetIEProxyConfigForCurrentUser called succeeded

Please help me out i am getting issue from long time.

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try these links

http://social.msdn.microsoft.com/forums/en-US/vssetup/thread/0376db8f-4761-4ae5-9af2-98c53216318a#How_to_diagnoseVS2008_NETFramework_logs

http://social.msdn.microsoft.com/Forums/en-US/netfxsetup/thread/2a3e870d-a655-4833-b0c8-2b7de5131dfd

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The problem is that the installer you are using--a little tiny file about half a megabyte, right?--is trying to download all the pieces of the service pack, and it's searching for a web proxy via the autoproxy interface. So, you need to tell the system not to search for a web proxy, which you can do in the Internet Explorer options here.

If that doesn't do the trick, then it's always possible to just download the full version of VS2008 SP1 (in .ISO disc format). (And, if you want the massive MSDN Library for VS2008 SP1, it's available in full download form too.)