Whenever you install a new program on your PC, you need to check for the latest update to the program. And, when you purchase a new PC as I recently did, there are a lot of updates which need to take place. So, I was not surprised when my PC told me that it needed to update the wireless card. And, I was not surprised when my wireless quit working there after.
Every time that I would try to connect, it would reject my password. Then I tried just pushing the sync button on my router but that too failed. Then, the PC told me to wait while it did some checking. And, as if by magic, it started working.