Hello, Thank you for your post.
From your description I cannot tell if you have tested this only on one network. But it would be good to find out if the issue persists if you try connecting to a different network (at a neighbors, at work, or at a hotspot). Whit this test you would narrow down the issue, if the issue is specific to your home network then you might want to reset the router, (just unplug it from the power, count to 15, then plug it back in) this would clean out any blocked devices.
If, on the other-hand, the issue persists, then you would be sure that it lies on the laptop, here you would try doing a system restore to a previous date when it still was working correctly, see the link below for more information:
You may also try to restart the computer into safe mode with networking, and try connecting there, see the link below for more information:
Now if you still have trouble after the system restore or in safe mode with networking, then you would consider contacting your laptop manufacturer for a replacement of the wireless card.
NOTE: This links is being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.