Sleep Mode derails Internet Connection

I have Windows 7 and use the settings of Balanced (the computer goes to sleep after 15 minutes).  I notice if I ever wake the PC I notice my internet connection is disconnected.  If I try to refresh the Internet page that is open I get a message that my internet connection is not found.  If I close the browser and re-open I am fine....Why does this occur ?  What should I do ?
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tekrageConnect With a Mentor Commented:
I've run into this problems with wireless connections on laptops - especially with laptops more than a year old.  I have an Alienware laptop that permanently loses its wireless connection if it goes to sleep.  I had to reboot to get it back.

You should look into doing a BIOS update and making sure your NIC drivers are up to date.  Also following the suggestion above to avoid having the NIC go to sleep at all is good although I'm not sure if that setting applies if the system goes into standby mode.

If I were you I'd check for a BIOS update.  Do a driver update on the NIC.  Also check and see if you can set your suspend type to S1 in the BIOS.  That's a more 'shallow' sleep mode meaning the system doesn't shut down as many resources.

Matt VCommented:
Check the properties of your network adapter (from device manager) and see if there is a power setting.  Often you will find a setting that allows the OS to suspend the NIC when the computer goes into low power mode.
B HCommented:
you can also find this setting under the power scheme options, under 'network connections' > turn off network connections > never
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Hazem IsmailCommented:
I am not sure if this apply if you are using a WLAN, i expect No.
pbo1Author Commented:
Intel 82578DC NIC with a power management tab...none of  the below options are selected..should they be ?

For the Intel 82578DC Gigabit Network Connection Properties
Power Saver Options:
Reduce link speed during system idle time

Wake on LAN:
Wake on Magic Packet
Wake on Magic Packet from power off state
Wake on Link
Wake on Pattern Match

For Power Options for Windows 7 there are a number of options, but I only have listed 2 that may be applicable:
Hard Disk - turn off after 20 minutes
PCI Express - Moderate power savings

B HCommented:
the options you typed above, don't have much to do with this issue.

but - in the network card properties, you should see a checkbox for "allow windows to control the power state of this device".  unchecking that might fix it.

otherwise you might just want to avoid SLEEP mode if you want to keep an active network connection.  sleep/hibernate are pretty much intended to be low level "barely on" states - maybe you just want to have the monitor / hard drive turn off after X minutes.

pbo1Author Commented:
For the life of me I can not find  "allow windows to control the power state of this device"..On the NIC card I see tabs called Genereal/Teaming/VLANS/Link Speed/Driver/Advanced/Details/Resources/Power Management...You have indicated "he options you typed above, don't have much to do with this issue." I assume the tab called power management can be what tab would i find "allow windows to control the power state of this device"
B HConnect With a Mentor Commented:
i thought you would have an option like this (screenshot)

if you don't, your driver either doesn't support it or your bios has it disabled... might be worthwhile to go into bios and see if power management isn't disabled?

pbo1Author Commented:
Corrected it in BIOS
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