Pics look realllllyyyy blurry!

[gwennabeme]

When I preview my slide show, the images get realllly blurry. I saw in the FAQs that you need to go to File > Preferences > Output settings and uncheck the "apply anti-flickering filter" to see the images on your computer monitor without the filter bc its supposed to make it good for tv, but blurry on the computer. However, it still looks blurry on my computer. Any advice?