Random lag problem

Hi, this isnt really a serious problem just a nuisance.

Everytime I start up my computer and go on wow, I log my main and BAM massive lag so I cant do a think. So I Alt+F4 and if I log onto an alt, log off, and then on to my main there isnt any lag. Anyone got any suggestions / ideas for why this is happening?

Thanks in advance.

FAIL (the browser should render some flash content, not this).

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