What's Up With my Photoshop CS 8.0?

So last week, I had this thing with the Desk 365 virus on my Acer laptop. It’s been removed or so I am certain (Thus I have done multiple scans). Since around that time the shortcut to my Photoshop CS 8.0 is broken, delivering only this error:
http://i40.tinypic.com/zk1pc9.jpg
I have tried multiple times to reinstall it and during the process I actually get a similar error.
http://i43.tinypic.com/2eyxu3b.jpg
If I click ‘Ignore’ the process will continue and complete but the software will not work.

Alright, so I know what one of the first thoughts on your mind probably was, why CS 8.0, it’s quite an old version. Well a friend gave me a crack file to it so it’s the only full version I can have for free and am unable to spend the the expense on another.
In addition while using CS 6 in my class recently I have come to prefer CS 8.0.

Any suggestions please?