I have received the response from dell customer service. They told me they can only offer me a refurbished device replacement and it also required manager approval. I dont know who gives the courage to them to classify the device with 12 Support Assist test failures and blue screen errors within 3 months as a normal product only qualified for a refurbished replacement requiring manager approval?

Thanks for your assistance, unfortunately, I have done thorough tests multiple times, no problem is shown. But the same issue persist.I really want Alienware to give me a reliable solution.But they seem to be unreliable lol

First thing to do is run a full system diagnostic outside of Windows (i.e., not with support assist).  F12 at powerup to get in.

Any errors that arise:  Record by number (2000-0133, etc.) and record the validation code before contacting Dell.
If no errors arise and you still see blue screens, parse the crash dumps using something like Who Crashed (the free version will so fine -- Resplendence Software). That should help pinpoint the driver or software that caused the crash.

The warranty terms you agreed to (which Dell is communicating to you) are here:

https://www.dell.com/learn/us/en/uscorp1/legal_terms-conditions_dellgrmwebpage/art-limited-hardware-warranties

If they're offering a replacement system, take it -- you won't get a refund or a brand-new replacement, so those two are not options.

Since it's not clearly a hardware issue, carefully consider analyzing the crash dump logs to find out exactly what is causing the problem.

Hi @Patrick_1225 welcome to this free user to user Alienware laptop discussion forum. This is not Dell Support. 

First tier Dell Support are mandated to escalate this type of issue to senior Dell tier, that will evaluate the issue and has discretion to authorise a new replacement system. You can visit your online Dell account and create Service Request as a Formal complaint, and request for it to be escalated to senior Dell tier. You will have to wait a few weeks for senior Dell tier to complete their evaluation. 

Dell is now offering me a mother board replacement. However, they tell me there is an estimated delay for the mother board part; and the mother board is estimated to be shipped on July??? This is how they treat their loyal customer, the one who starts to use XPS since 2009: rudely requested me to wait until they come to "solve my case" and asked me to tolerate the problematic device without any further solution.

Hey Patrick,

Did you get your laptop issue resolved. I also have my X15 R2 and am experiencing the same process. The refurbished system exchange is obviously unacceptable and I am thinking of legal action against them. I just wonder how your case ended at last before I make a final decision. Thanks!