unable to open jpg's now

Tech-Archive recommends: Fix windows errors by optimizing your registry

I copied some jpg's from a cd to my hard drive last night and I viewed all
the pics after they were copied to my hard drive. Today I went to view the
pics and only about 8 out of 100 are now viewable. Even jpg's that were in
that folder previous to last night are now unreadable. They all have the
correct file size and name but are unreadable for some reason.

Any ideas?

Thank You

Kevin


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