How can I retrieve this from my Computer, please?

My Computer was running so slowly that it took forever to come up to speed. I had downloaded some updates yesterday morning and these had seemed to slow the computer down. So I decided to do a System Restore to take the Computer back to early yesterday morning. Unfortunately, I miscalculated and took the System Restore back too far–back before I downloaded the latest version of the Internet Security package fitted.

I did another System Restore to take the Computer up to yesterday morning but, unfortunately it looks like I may have lost the Security package. I attempted to install the original package (from 2009) but was unsuccessful. I got a message telling me that the new package is still active.

Is this possible? As far as I can see the Security Package is no longer working.

How could I retrieve the files? I don’t wish to purchase another package as they are very expensive here in Australia.

By the way, the Computer is now working at lightning speed.