Connection problems

For the last day or so I've been having to refresh the page for any browser on any computer on my wireless network I've cleaned temp internet files on all 3 computer, have ran virus scans on them, and tried all sorts of fixes ive seen online about this problem. Some pages load just fine and other I have to refresh a lot to get them to come up this is happening on all 3 computers. It even happened when i had one of the computers plugged straight into the dsl modem.
This all started after the power supply in the computer that's wired to the router went out, I replaced and then the internet start doing this on all the computer after a couple of hours.
I was hoping i could get some help online to fix this with out having to talk to some Indian guy overseas.

Please and Thank you.

 

how would a router reset help? even if the computer is plugged into the modem and the router is out of the picture it still gives me the same problem