Hi Reddappa,
The SP1 is required when SQL Server is installed on win8 or windows server 2012. Install or update SQL Server 2008 R2 SP2 will need administrative rights on the computer.
You should check the hardware and software on your computer. And please download SQL Server 2008 express with SP2 from http://www.microsoft.com/en-us/download/details.aspx?id=30438 .
Please refer to: How to install SQL Server 2008 R2 express with SP2: http://www.sqlcoffee.com/Tips0014.htm.
If it is still not work, please post me your error messages in "C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log".
Regards,
Amy Peng
