help in sql express install needed

TITLE: SQL Server 2008 R2 Setup
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The following error has occurred:

An error occurred during the installation of assembly 'Microsoft.VC80.CRT,version="8.0.50727.42",type="win32",processorArchitecture="x86",publicKeyToken="1fc8b3b9a1e18e3b"'. Please refer to Help and Support for more information.

For help, click: http://go.microsoft.com/fwlink?LinkID=20476&ProdName=Microsoft+SQL+Server&EvtSrc=setup.rll&EvtID=50000&ProdVer=10.50.4000.0&EvtType=0xF45F6601%25401201%25401

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BUTTONS:

OK
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