My husband has a Mac mini, vintage 2009, running Snow Leopard. All other computers and devices in the house are able to connect to our wireless network, but since I upgraded his computer to Snow Leaopard  it won't connect. What is the problem?

What am I missing here. I'm sure it is some kind of sitting that is not right.
Thanks Pat

Sounds familiar:
lllaassJan 6, 2015 2:12 PM Re: My husband has a Mac mini, vintage 2009, running Snow Leopard. All other computers and devices in the house are able to connect to our wireless network, but since I upgraded his computer to Snow Leaopard  it won't connect. What is the problem?
Re: My husband has a Mac mini, vintage 2009, running Snow Leopard. All other computers and devices in the house are able to connect to our wireless network, but since I upgraded his computer to Snow Leaopard  it won't connect. What is the problem?in response to Patricia Isaac1
Power off and then back on the router
What happens when you enter the network's PW?
Try forgetting/deleting the network if necessary. To do that go to System Preferences>Network>wifi>Advanced and select the network and click on the minus sign
Csound1 wrote:
Turn off the modem and the router, wait 60 seconds. Turn on the modem, wait 60 seconds, turn on the router.

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