why isn't my 5ghz wifi connection working? but 2.5ghz is?

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HI actually just bought a wifi pci card with bluetooth. setup the drivers and everything. It worked for a month then right now I can't seem to get my 5ghz connection to work, it has an exclamation point next to the wifi icon. But when I try to connect to my 2.5ghz wifi connection it seems to be ok and normal. What happened? Oh and in my device manager I spotted a XMOS DFU item that has an exclamation point next to it. Can anyone help? the router was in a fritz last week, so I restarted it to get connection (unplugged and plugged in again).

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hoy83

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Posted: 3 years ago
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