First thing to try is to update the wireless adaptor drivers - connect the PC by ethernet
Go into Device Manager - start - control panel - system and maintenance - device manager
Click on this and go to network adaptors - click on this to expand. Right click on the adaptors and you have the opportunity to update.
Now try to connect wirelessly while it is still connected by ethernet. You should get the option to change the network from public to private - do this.
If it looks as though it has connected - terminate the connection and remove the ethernet cable.
Try to connect wirelessly.
If this works switch off and boot up.