My my pictures folder isn't working correctly?

I have a Windows 7 which I've had for a couple of years, and mostly everything's been fine up until about a month or so ago.
I've been trying to sync the photos from my iPhone 4s, but it's come up with this error saying something like "windows photo viewer not available" or something along those lines. Anyway, I thought that it was a problem with my phone, but then I went onto my pictures folder, and as soon as I try to view - or even just tick a picture, it freezes for ages, and then it goes back to normal, but it happens every single time I try to do this. It's really irritating me, and I really need it back to normal. If anyone can help, I'd really appreciate it!

May be some files of your window has been crashed, so you should repair your window, may be your problem will be solved, If you still facing the problem then you should reinstall a new copy of window.

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