Can't Open Pics By Double Clicking

Hi I'm hoping someone can help me. I discovered last week that my
computer was infected with lots of nasty spyware. So this morning I
ran the three programs I was told to use to clean that mess up with
(Ad-aware, Spybot, and SpySweeper) . All the spyware seems to be gone
and my computer is running much faster. I noticed though that when I
went into My Computer my graphic files looked odd. I've been using
Corel Photo House as my default photo viewer and the little icon next
to the names is missing. When I go to double click it says
corelpnt.exe is missing. But I do still have the program on my
computer. If I open the program directly I can view pictures. I also
have Photoshop 7 and PSP 7 that I can view the pictures with if I go
into the program directly. Is there anything I can do? Maybe make
PSP my default picture viewer? Any help or advice would be greatly
appreciated. Thank you!

Donna