Lenovo yoga 720 help! If you are a tech person, please please help me out?

So over a week ago, I bought the Lenovo Yoga 720 13 inch 2-in-1 laptop. I noticed that the fan noise was too loud and that the screen would flicker. I checked for updates and there were some. When I tried to update it, it would be stuck at 0 percent. I ended up returning it and the store manager told me that I probably just got a bad one by luck but I ended up exchanging it for the Dell Inspiron 13 7000 2-in-1, which now I hate because the battery life is weak and there's a problem with their screen frame. I don't know if I should go back for the lenovo yoga 720 or not. I mean I can't just keep switching my laptops! Do updates help the fan noise? I also heard the lenovo yoga 720 has a really good battery life.

Friend to go on eBay and look for a Lenovo x220 tablet PC they have some awesome Tablet PCs x220 I have a lot of experience with this computer it is fast and very powerful what's more it's Dirt Cheap compared with what you have been buying and you can even get a one year warranty to go with it take that new computer you've bought and take it back get your Cash & Go on eBay and get yourself a text to 20 tablet PC find one that has a solid state drive and maximum RAM I'm telling you you will be very happy far happier than the thing you have now in fact there's an awesome one on eBay right now for slightly less than $300 6 gigs of RAM and an SSD go check it out again I'm a computer man and I've had a lot of these and not one person was dissatisfied with it