Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Can the DVD drive be upgraded to a blu ray drive or blu ray burner?
Document: (Been in IT for 15 years FYI). After all of this the laptop still ran poorly, and performed poorly on all benchmark tests, video performance tests, games ran choppy and slow, youtube videos would not play on 1080P resolutions etc. Called Asus upgraded video drivers, rolled back Windows and nothing better. I believe this laptop is ALMOST there but needs a faster hard drive speed (solid state + 7200RPM), and also needs Blu-Ray player for the price.
Almost as fast as my desktop that is basically an ASUS gamer. Optical drive seems to be a slow reader for some reason, but it will not be used all that much. Screen is very clear even though it cancels out nearly all glare from bright overhead lighting. Biggest problem was finding a notebook bag at a reasonable price that this monster will fit in. The OS was upgraded from Windows 8 to 8.1 by myself with not problems identified.
I purchased this laptop for 1275 last week from best buy and couldn't be happier. It came installed with 8Gb of RAM, which I upgraded to 16Gb. That was super easy considering there are four total slots and two unused if you get the 8Gb version. I'm not a huge fan of windows 8, but it looks nice. I play flight simulators and this beast runs them on full settings with no problem.
Computer startup and setup was quick and uneventful, and I duly upgraded to Win 8.1. No problems with battery or power cord.However, the keyboard is indeed somewhat unreliable, and some keys were poorly attached, but this was remedied.Performance was up to expectations for the hardware.Installing an SSD turned out to be impossible because the screws on the extra 2.5&#34; slot were nigh unremovable, and ended snapping off the plastic structure.
This is disappointing as before I upgraded my desktop to a GTX 670 FTW, it was running just a regular GTX 650 with no overclock and even it would run before mentioned games on high settings with zero lag. The GTX 765M supposedly tested higher on 3dMark than the GTX 650 desktop card, but real game performance shows significantly less performance. I checked and the computer is utilizing the GTX 765M and not integrated Intel 4000HD (which is permanently disabled on this particular model).
The hard drive was bad and that happens, but the Customer Service was TERRIBLE!!!!!! E xcuses after excuses about their system in the Carribean not working. Not happy!
I bought the JCW version for price and then added my own SSD drive on the extra port and added 4GB of memory in the spare slot.
I was really excited to get this laptop but after a few days, I encountered and dealt with the following problems:1. The 1024 GB 5400 rpm Hard Drive that comes with the laptop does not fit the spec. and the performance of this awesome machine.
Which brings me to one of the reasons why I purchased this particular laptop (incurring the weight and bulk): it has two 2.5" hard drive bays. I loaded an SSD (Crucial m500) into the 2nd bay and it found it without a problem.
Very nice computer, Put a new SSD drive in it and it boots up in less than 10 secs. Keyboard is nice, touch pad big and responsive. Not much bloatware installed on it. Would recommend to anyone wanting to replace a desktop,. 7.4 on windows experience rating.
Answer: Yes, it can.