I should probably copy and paste this so that I don't have to type it some many times to spread the word.
We had the same problem. Acer, HP, Lenova and Toshiba laptops with a Linksys (3 different ones as it is cheaper to buy a new one than to purchase support) and then NetGear router. Connected every time we booted, and sometimes several hours (or sometimes minutes) before the Limited or No Connectivity would raise its' ugly head. The Linksys's would lose connectivity every 5 minutes or so and ALWAYS in the middle of something that I did not want to lose while saving to a server.
Several dozens of hours and hundred of dollars in support costs - replaced the Linksys router twice (I will never purchase anything Linksys again) - replaced the NetGear router (talk about lousy support) - replaced the modem - replaced cables - upgraded and/or replaced drivers - and the list goes on and on.
If you search the web for something like - keep losing wireless connection (90,000 finds on Google) - or - wifi keeps losing connection (10,100,000 NOT A TYPO) you will see all kinds of 'fixes', most of which take an advanced degree. I tried a LOT of them.
So I got this notice that Norton Anti-Virus was going to expire and I am miffed at them anyway as another subscription on another computer got renewed 4 times though their automatic system so that I have over 1,400 days paid and they refused to credit my card or 'spread' that out among the other computers - SOOOO - I uninstalled Norton on the expiring laptop - download the Free version of Avast (which found 6 files (missed by Norton) with attachments that were never opened (fortunately) and it has been over a month since I have had the problem.
While I hate to say the fault is Norton, by elimination that is what I am doing. We also eliminated the problem on the only McAfee machine and the problem stopped there as well.
I have since loaded Avast on each computer that was having a problem and not a single one has experienced the issue since - as well as booting and running faster than they used to.
I have no involvement with Avast other than being more than Satisfied and will be upgrading to the Paid version on each machine because I am happy!