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Can't open pdf files from sites as shown in troubleshooting info but it works OK in IExplorer. Help, please

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I can no longer open pdf files when clicking on a link such as: shown in troubleshooting info.

It used to work on earlier version when I had XP, now I'm Win7Pro and using version 5.0.1 The links work fine with Internet Explorer. Help, please.

I can no longer open pdf files when clicking on a link such as: shown in troubleshooting info. It used to work on earlier version when I had XP, now I'm Win7Pro and using version 5.0.1 The links work fine with Internet Explorer. Help, please.

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Type in about:plugins into the location bar and press "Enter", at the the top is a line for plug-ins test pointing to mozilla.com/plugincheck/

You should have Version: 10.1.0.534 for adobe acrobat but you have two older versions instead. If the one does not replace both you may have to disable the really old one, or remove through the control panel.