How to solve Windows PowerShell" failed in Sql server 2008

I got this error while i was updating my sql server 2005 express edition to Sql server 2008 edition. For solution of this error, I found that I need to install the Window Powershell ( a microsoft component). After installing that Installation completed the successfully ran.

Visit on below link to download the window powershell:

http://www.microsoft.com/downloads/en/details.aspx?familyid=6CCB7E0D-8F1D-4B97-A397-47BCC8BA3806&displaylang=en

To download this, we need to pass window genuine check. After check you will get the download link. Size of this component is 1.5 MB (english language component)

Click here to go on website