osuhallock :
I have an hp wirless printer. everytime i shut down or lose connection, i have to reinstall printer. Why won't it save to my laptop? What's the fix?
I struggled with this problem for over a year! I even replaced the printer and I still had the problem. I finally found the solution on the Comcast support forum:
http://forums.comcast.com/t5/Home-Networking-Router-WiFi/Problems-connecting-laptop-to-wireless-printer-over-home-network/td-p/1747247
Here is the solution:
1) Use a static IP address on your printer. Look in your user's manual and find a way to set the IP address on your printer so it doesn't change even you reboot your router. On my Epson, I go into the control panel and use the "Manual Wi-Fi Setup".
2) Routers have a setting called "AP Isolation". This setting, if enabled, isolates the Wi-Fi clients so they cannot see each other. Make sure the AP Isolation is disabled. Now, here is my problem. I had the AP Isolation disabled. However, after a few weeks, I could not hit the printer. It just wouldn't connect ("unreachable"). After reading the Comcast post, I turned the AP Isolation setting on (Enabled) and then I saved my settings. Then, I turned the AP Isolation back off (Disabled) and I saved my settings again. The wireless connection worked again! Yea! So, apparently my Cisco M20 router just starts isolating the AP clients for no reason after a few weeks even though the AP Isolation setting is disabled. Yesterday, I downloaded a new firmware for my router and I installed it. I am hoping that this firmware solves the problem permanently. However, if the printer becomes "unreachable" again, I will simply turn on AP Isolation, save settings, then turn off AP Isolation and save settings again.
I am very detailed in this post because I have been searching for this answer for over a year. This problem has caused me a lot of grief. I am hoping to save a lot of people from this hassle. Best wishes!