Hi, jbgengr,
Welcome to Sony Community!
"Last week it decided to slow to the point I can't open a browser."
If you can't open a browser then probably this is not a wireless network issue / not just a wireless network issue. The web browser should open displaying the message "page cannot be displayed". This could also be an issue with the band frequency of your built-in wireless LAN adapter and the current wireless router you have. To further isolate the issue, follow the guidelines here: https://us.en.kb.sony.com/app/answers/detail/a_id/41882/.
Regards,
Vincent
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