Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Does anyone else have a problem with the screen brightness auto adjusting up and down for no reason when on battery?
Document: I received my long-anticipated Zenbook Prime last night and booted it up. There were at least four big dead pixels in the middle section of the screen, and as some of you will relate to, it's impossible to concentrate on anything else when that happens. I am exchanging for another one (Amazon always comes through almost immediately) and I will update once new screen comes.
I believe Amazon, and buy this expensive laptop without worry, after 9 days waiting, what I receive is just a full disappointment !yes,this is a entirely defective product!1.the bottom of the screen will flash when I surf the internet or open a PDF file !2.the touch pad does not function very well sometimes!3. the audio has noise now and then !I contact the seller Adorama  and no matter how I claim that problem, Adorama refuse to return or exchange !
The battery was not charging. Computer had scratches and stains. The packaging boxes were filled with dirty old newspaper pieces and looked like junk. Had to return it back.
I bought this machine from a smallish retailer and fell in love with it from the moment I opened the box. The design is sleek, it is quick, the battery lasts for long periods (on battery saving mode), and it is even serviceable for some light gaming.
After using GCleaner and some antivirus/regedit softwares, I finally had a functioning Zenbook. After 2 weeks of light use, the Zenbook died on me. The battery was fully charged and the power adapter was working fine, but the Laptop would not turn on. It essentially died. ASUS had nothing for me and wanted to me send it in (I would have to pay for my own shipping).
I purchased the gift cards with the purpose of buying this high end laptop. There is nothing else on the market equivalent to this laptop. With such a poor product and nothing else on the market equivalent, I have no use for $1000.00 Amazon gift card. I requested a refund in a different form and was told they can "try" but policy states gift cards can only be refunded in a form of a gift card.I am very disappointed with this product and Amazon.
Amazon did a great job, the device arrived quickly, double boxed and in perfect shape.The Zenbook arrived in clean packaging from ASUS, it doesn't mention on the Amazon description but an ASUS branded sleeve is included). The setup was easy and performance was snappy. There was a fair bit of backlight leakage from the bottom edge of the panel into the screen, but it was only noticeable on full black, colors were nice.
One day this WILL BE the best display out there. But until the rest of the world catches up and websites are more responsive with higher-resolution images, this screen actually does more harm than good in my opinion.2) Trackpad doesn't shut off:  I don't know what it is the other ultrabooks seemed to have accomplished, but when using them, the trackpad sending clicks off in the wrong direction by being grazed by your palms while typing is almost NOTHING compared to this one.
I left without turning it on hoping that first one was just a lemon and this time everything will be smooth. Was I wrong!When I arrived to Russia and finally turned it on I screamed, the screen had this weird nebula/milky way looking defect (kind of like our galaxy of you look at it from the side, just google image search &#34;milky way infrared&#34; and it looks exactly like that).
I thought it was me till I tried another -- no problem on other ultrabook keyboards.4) Actually, TOO sharp:  One other issue I had was one of the reasons I bought it in the first place. I LOVED how thin and razor-sharp the design looked. However that was the problem.
Answer: Windows 8. Issue resolved for Auto-Brightnessa) Press Windows Key + X, click on Control Panel.b) Click on Power Options, Click on Change Plan settings under "Preferred Plans"c) Click on "Change Advanced Power Settings".d) Select the Balanced Active option from the dropdown menu.e) Expand Display, Click on Enable Adaptive Brightness.f) Put the settings as OFF.g) Press Apply and OK.h) Restart your computer.