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Is the Static IP Address on the router, or is it on the computer?
What is your internet source, cable internet? or satellite? or fiber-optic? or DSL/ADSL?
Try restarting your computer, of course.
Is the modem separate from the router? if so, then first power down both of them. Then wait 5 minutes. Then power On just the modem. Wait 5 minutes, then power On the router also.
Then 2 minutes later, see if the internet is usable.
Let me know how it goes from there, and the other information I need on the basic setup. Thanks.