i've just started getting the same issue on my dell tablet - was working fine until about four weeks ago and now it happens every few minutes. i've tried changing various adapter settings but nothing seems to work. of all the support articles i've seen the most similar seems to be related to power management incompatibility with the intel network cards but the instructions for correcting it do not seem to be available in my system so i don't think it's my problem.

If you can get an IP address from your connection then it is not receiving any internet then it may be your computer is not able to "gateway" out.  All you have to do [usually] is change your MAC address by going into your system drivers options in the control panel.  Not all wireless adapters have that option.  

I do receive internet for a short time, then for no reason internet is no longer working but connection still shows strong. 

I have found out that this problem goes away if you set a static IP for the tablet. This is only a temporary solution as we would like to not have a static ip set.