Have you tried the suggested methods for reboot/resetting your router? Sometimes the network stack becomes corrupted and needs to be reset.
I leaning heavily that your router is the culprit, since your able to access your network but you say you just cant see it. Is your network hidden...meaning the SSID broadcast signal has been turned off?
Can you post some screen shots of networks panel of windows 8?
Worst case scenario, your windows files has become corrupted and needs to be reapaired. You can try running "sfc /scannow" with out the quotes in a command prompt window. If there are in files missing or corrupt, this will find them and attempt to fix them.
You could try the windows Fixit center and see if that does anything for you. Microsoft Support