ERROR: The Windows Installer Service could not be accessed. This can occur if the Windows Installer is not correctly installed. Contact your support personnel for assistance.

Hello Everyone,

I keep getting this when trying to install 0r repair SQL Server 2008 R2 on a SBS  2011 Standard.

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

The Windows Installer Service could not be accessed. This can occur if the Windows Installer is not correctly installed. Contact your support personnel for assistance.

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

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BUTTONS:

OK
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the provided link says  "There is no additional information about this issue" i am helpless

please tell assist.

Thanks.

Abdallah.M.M