HP Pavilion dv6-1245dx Entertainment laptop computer, manufactured by Hewlett-Packard in 2009.
I had to reinstall Windows 7 Home Premium on my Mom's laptop bc Windows 10 would not roll back to Windows 7 (the printer driver won't work with Win 10) Now it acts like it has no wireless card
Have you tried using ethernet to connect yet? If it does, then just use that connection to re-download drivers for any "Unknown Devices" in device manager.
If your ethernet does not work, then you will need to do one of the following:
1. Buy a USB Network Adapter (which normally start around $35 for something decent)
2. If you already have the Windows 10 bits on your computer, go back to 10 and download drivers.
3. Use a different computer to download driver installers onto some kind of transmission media (USB/CD/DVD) or,
4. Take it to a repair shop that has these tools
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