Error installing SQL Server 2008 R2 Enterprise as upgrade to SQL Server 2008 Standard SP1:
The following error has occurred:
An error occurred during the installation of assembly 'Microsoft.VC80.ATL,version="8.0.50727.4053",publicKeyToken="1fc8b3b9a1e18e3b",processorArchitecture="amd64",type="win32"'. Please refer to Help and Support for more information. HRESULT: 0x80070003.
For help, click: http://go.microsoft.com/fwlink?LinkID=20476&ProdName=Microsoft+SQL+Server&EvtSrc=setup.rll&EvtID=50000&ProdVer=10.50.1600.1&EvtType=0xDF039760%25401201%25401 (This page is blank!)