I use WPA-PSK with password and my router and having trouble connecting to it with my laptop I fixed yesterday by resetting RTC (CMOS?) battery. Although my laptop additionally has errors with my administrator account, I still think it has nothing to do with current problem because I tried connecting from the guest account and additional administrator account I have created.
Here are the settings of router:
I do not remember the error message exactly, but it said something about checking range to hotspot and area of networking... All other laptops connect without problems.