Puz. Extension file

I just had to start all over, some kind of Virus. Lots of problems. First I had upgraded my original system to Win 7, after starting over I am back to what the computer originally had installed, Vista Premium, now when I try my upgrade, it won’t take keeps saying to start over. Plus with this Vista I have a program I use daily and the puz. extension is missing or never was, how do you go about retrieving these extensions?

Have you checked this:
http://filext.com/alphalist.php?extstart=^P

[QUOTE=Da_Taxman;2567459]Have you checked this:
http://filext.com/alphalist.php?extstart=^P[/QUOTE]
Thanks for the reply Taxman. Are there any free programs for this problem, I remember a long time ago I used one, cannot find again anywhere. T.I.A.