Hello Kenvy,
Thank you for your reply.
Do you receive any error message when you try to install Office Home and Student 2010?
What is the default browser in use?
You may delete all the browsing history, cache and the temp files from the browser and check if you are able to download and install Office Home
and Student 2010.
You may start the computer in clean boot mode, this would disable all the non-Microsoft applications and the antivirus which could be one of the
reason for the error.
Refer the article below to start the computer in clean boot:
http://support.microsoft.com/kb/929135
Note: Ensure to restart the computer in normal mode after completing the troubleshooting steps
I hope the above information helps. Let us know if you need further assistance.
Thank you.