Any help appreciated.

I had a virus on it a couple of days ago. It was XP malware , that kept coming up that I should buy it lol. Malware bytes seems to have removed it but when I go to open word or msn messenger etc, i double click, but it comes up with 'what program would you like to open this with'...? Or use the net....

It's like everything has been deleted but the icons are there I that makes sense.

Any ideas please? I'm happy to format it and start again but don't know how