I had updated my Lumia 540 to win 10 about 3 months ago. My phone is lagging severely. I have performed hard reset a no. Of times. Every it undergoes a hard reset it works smoothly for a few days then back to lagging problem.... What should i do???
it is no surprise that windows 10 is very blunt and unpolished and low end devices like yours will be the most effected. at present what you could do is perform a soft reset whenever you feel the device slowing up and wait for future os updates to improve performance.