Having problems with windows 8 computer losing wireless connection?

I am on my 2nd NEW Dell computer with Windows 8 in the last 3 weeks. I use a Trendnet wireless router to connect to the internet. The 1st Dell computer dropped the wireless signal from the 2nd day I had it. The 2nd Dell computer started dropping the wireless signal very frequently the 5th day I had it. My Dell Inspiron 1545 computer that is 3 years old, 1 yr old ipod and 6 month old iphone  never drops the wireless signal. PLEASE HELP!!!  I have been in contact with Dell numerous times with any resolution to this problem,

I have a new Toshiba Laptop with WIN 8 pre-installed and I have the same problem.  I ran the problem determination program and it reset the WiFi card and reported problem fixed.  It keeps reoccurring, I have 2 WIN 7 laptops that have no problem at all.

Symptom:  During normal operation, the wireless connection to the router drops to limited connection (No Internet).  It doesn't actually lose the router, it just loses internet connectivity.

Update - visited the Intel website to check drivers.  They had an updated driver, even though the driver search said I was current.  I updated the driver and 24 hours later I have not had any drops.  Hopefully that fixed it for me.   http://www.intel.com/p/en_US/support/detect/wireless