Bryan, maybe try deleting all your cookies through the browser itself first, and then run CCleaner to remove any leftover cookies and clear your browsers cache.

Sometimes a rogue cookie can be picked up which will inhibit logging into other sites. With it happening on four different computers, it may be a fruitless venture unless you regularly use them all to surf. If that's the case, then the same cookie could be on all the machines, ergo restricting your login.

I hope that helps.

The only reasonable argument for owning a gun is to protect yourself from the police.