Can't find network printer

Question

I've got a HP Photosmart Plus installed on my network. I install it on every computer in the house (4 computers), and then it works.
But when I close the computer and restart, the computer can't find the printer.
It's still connected to the network, that I can see if I open my router.
The only way is to reinstall the printer, but sometimes the computer can't find the printer to install.
This happens on both W7 oand W8.
Anyone knows whats wrong.

Answer 1

These settings are for setting up your wireless printer to stay connected to your router, keep wireless devices better connected and makes your router secure and hack proof.
1. Set a static IP in the printer (click here) outside the DHCP range of the router (check your manual).
   This is for Linksys routers but can be used for all routers. Verify your DHCP range and change this
   first if needed. More Wireless Printing help is here (Windows solution 4, static IP).
2. Verify in the printer that 'Auto Off/Sleep' is disabled.  Use the Embedded Web Server (EWS) by going
   to the printers IP address in your browsers address bar, click Settings Tab/Auto Off. Or use the Printer
   Assistant, Printer Home Page (EWS). Also check your Printers Properties.
3. If the printer supports and has IPv6 enabled, turn off IPv6 in the printer.
4. If needed and you assigned a static IP address, try using 8.8.8.8 for the Preferred DNS server and
     8.8.4.4 at the Alternate DNS server.
In the router: (Refer to your router manual for information)
5. Use a fixed wireless channel like 1, 6 or 11, never 'auto', try channel 1 first then the rest. 
6. Set router to 20Mhz only, or 145Mbps depending on router. 
7. Always use WPA2-AES (Personal) encryption, but you can try ‘mixed’ mode. 
8. Disable WPS and never use it and disable UPnP for the routers security. Nobody can hack your
   system now and helps with wireless connectivity (if you want to know why, search the web).
9. If you have a dual band router (2.4Ghz and 5.0Ghz bands), make sure the SSID’s are NOT the same,
   they must be different for all bands, even for any Guest networks.
10. SSID broadcast must be enabled.
11. Save all settings. Power off both, wait 2 mins.  Power on router wait 2 mins. 
12. Power on printer and verify it reconnects to router. 
Windows 7/8/8.1   Is Network Discovery on or off?
Control Panel/Network and Internet/Network and Sharing Center/Advanced sharing settings.
Under Home or Work (current profile) / Network Discovery.
Select "Turn on network discovery" and save changes
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