My freezes started when I changed my hard drive (i switched to win 10 at the same occasion) and didn't install the right drivers. Make sure your drivers are up to date and in the proper version of windows
I've had a ux303ln in the past, hinges broke after 6 months of mild use, HDD crashed after a year and it finally shut down and never woke up again after 2 years and 3 months.
I wanted to know if you experienced any problem with your ux303ub so far