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firefox won't start whenI click on the icon; info on help page doesn't help

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I have Windows XP and Verizon Internet Security Suite. I've installed Firefox twice (with an uninstall in between) and it still won't load when I double-click on the icon. It runs fine on my other laptop with same OS and same anti-virus/firewall. Info on help page doesn't actually address this problem, even though the headline indicates it does.

This happened

Every time Firefox opened

Firefox has never actually opened. I double-click the icon and nothing happens. Check task mgr, it's not listed.

User Agent

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

I have Windows XP and Verizon Internet Security Suite. I've installed Firefox twice (with an uninstall in between) and it still won't load when I double-click on the icon. It runs fine on my other laptop with same OS and same anti-virus/firewall. Info on help page doesn't actually address this problem, even though the headline indicates it does. == This happened == Every time Firefox opened == Firefox has never actually opened. I double-click the icon and nothing happens. Check task mgr, it's not listed. == == User Agent == Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

Alle svar (2)

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See my update at 6:46PST - having the very same problem on a MacBook Pro. Someone named "Sherry" posted around 5:42PST w/ same problem. No techies are picking up on these posts, though. Please add a comment to mine as well to keep it at the top and see if we can get some visibility to what is obviously a bug.

Did you upload a new version/update? That is what caused my problem

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Same Problem here. Firefox won't start when I click on the icon. I have a Macbook