Asus x205ta i have was using fine, then a symbol triangle yellow came at bottom page saying memory low save so i press ok 10 m

[CRAZYGIRL16]

I have asus x205ta under year old tonight was using says a triangle smbol bottom memory low save and press ok i did that 10 mins later came online agaib this time buzzing sound just wont stop i close lid down open still same. i now can put my password in but page does nothing just buzzing al time, i have had tp press the on button and take battery out power socket to stop, what can it be please also have many family videos i dont want loose thanks. running 8.1 windoes

 

[hang-the-9]

Buzzing is not good, where is that sound coming from? Power supply? Hard-drive? Speakers? This happens every time you try to use the system?