Question ASUS Zenbook UX330U Laptop

[mdmm55]

Good Day.
My ASUS ZENBOOK, Model UX330U i5 Notebook, is 5 yrs old.
When Laptop is on and am using any website on browser, and I press some keys like Q , Backspace, etc etc, it goes back to main screen.I have to go back to browser to locate previous page each time.Similarly I have to press some keys deep/hard, then it work. I am not PC expert.
Kindly help.

 

[mdmm55]

Good day,
I am a senior citizen with limited pc knowledge.Kindly help me.

 

[COLGeek]

Have you been allowing Windows and your applications to stay updated?

Also, have you scanned for malware recently?

Is there a collection of debris around the keys? The pressing hard comment suggests a physical issue that may be improved by taking a can of compressed air and blowing crud away from your keyboard.