If it hasn't been too long since this started happening, you could use System Restore to go back to before you installed this program. If it has been too long, I'm afraid you've learned the hard way why you need to make your own system backups to an external hard drive. You could end up having to restore to factory settings according to the instructions in your user guide.
I made the huge mistake of installing the Smile by Webshots desktop, and now I can't get rid of it! Naturally the first thing I tried was the usual uninstall, but that failed because apparently the stupid program downloaded without the uninstall info! So I tried reinstalling to see if maybe the initial downloaded exe was flawed - that didn't work either - it refused to install because it couldn't remove old existing files either. So now the freakin thing keeps popping up, doesn't work, but won't let me delete it. I am running HP P62-101 with Win7 Premium Home. I have only moderate tinkering skills, but if you speak basic English I will be able to follow instructions. Please advise!