The following advice applies to both OP and gamerx71.
First of all, I assume that attempts to uninstall thru Add/Remove Programs are unsuccessful and also that antivirus scans find nothing.
Now, malware does not like to manifest itself in the Add/Remove Programs entries. And if your antivirus finds nothing, it’s unlikely to be malware.
In fact, Shaun White Skateboarding is a game with an official site, which I checked and is not malicious:
http://shaunwhitegame.uk.ubi.com/skateboarding/
As to how it got there without you knowing, one possibility is that it was packed as a trial version with something else you installed, but this is just a wild guess of mine.
The simplest way of getting rid of it, if it works, is to restore the system to a point before you installed what you suspect that brought it.
If that is no longer possible, my advice is to try to uninstall it using Revo Uninstaller Pro at the advanced mode. You can get it on free trial if you don’t want to buy it.
http://www.revouninstaller.com/
First try to uninstall it from Revo’s list. In most cases, Revo Uninstaller Pro can handle the uninstall process even if the built-in uninstaller of the program is not working properly. In such case you should start the uninstall procedure with Revo Uninstaller as usual and when you see that error message you have to skip (ignore) that message and press the "Scan" button to start the scanning for the remnants of the program and continue forward the uninstall procedure reviewing and deleting found program's data.
You can also do Forced Uninstall by entering the program’s name. This is the best solution when you have to remove stubborn programs, partially installed programs, partially uninstalled programs, and programs not listed as installed at all!
Good luck and let me know your progress.