Can't preview thumbnails

I have WIN2000 NT/Office 2000 professional--up until a couple days ago, I was able to open picture folders and view thumbnails. I can still click on individual pictures, but can't view images when I click on thumbnail--I get a message where the image should be---that says "no preview available". Any ideas to troubleshoot or resolve?

:(

aquarius, For a Preview Fix follow the instructions exactly for your operating system at the link below.

http://www.pcnineoneone.com/tweaks/fixes1b.html

For a Thumbnail Fix the link below has instructions if you're using Internet Explorer 5 or 6.

http://www.forrestandassociates.co.u...st/thumbs.html

HTH
Tufenuf