I was having the same problem with my wireless when running on the battery. I set my power settings to high perfomance and the wifi now works great when on battery only. Hope this helps.

rick thanks for the reply, i switched it to full performance but it again gave the same thing, connectivity with the network was lost and i had to disable and enable the adapter again. . .

btw is your bluetooth working fine? coz mine is not working

Is the copy of Windows on the system a  factory install, or was Windows installed or reinstalled manually after the system was received?

its not factory installed , the dealer installed it and then went to website and downloaded all the drivers, from day one my bluetooth was giving the yellow sign under the driver in device manager, the wireless was working fine for some days but now its giving a hard time, enabling and disabling wont work now, i have to restart the system to make it work now. any suggestions... i have windows defender updated and also avast antivirus, and all the updates from microsoft are installed

ok thanks for the support i will do the installtiong in near future , and if the problem exist i will come back :)

thank for your support DELL ...

It would have been unusual for a budget model like the 5110 - particularly with a low-end CPU and video chip - to have come with Windows Ultimate.  Did you order it that way from Dell?

Now you have me wondering, how do you know if it's factory installed or not?

no i bought it from a authorized dealer, i purchased win 7 copy with it , the os along with dell was only dos

It is only possible suggestion, I have very similar problem, re installed all windows 2 times, first time just installing drivers, second time, did exactly as was written on drivers installing manual. Problems still occurs. Thanks for answer, but it may be not only problem.

Best regards, Aurimas