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I have been trying to install addons (Adobe PDF Reader & Flash) they both download but WILL NOT RUN!

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Did not run in Microsoft Security essentials even with Real Time Protection turned off.

Now Running Kaspersky Pure (as of yesterday) and won't install either.

Did not run in Microsoft Security essentials even with Real Time Protection turned off. Now Running Kaspersky Pure (as of yesterday) and won't install either.

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Upgrade your browser to Firefox 8 and check

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I upgraded to Firefox 8.0.1 and it didn't help at all!

Will not auto or manual install.