Lag on the 15 Lenovo Y50 (UHD [4K]) laptop?

I've done everything to boost the performance of my laptop, but whenever I watch videos, it tends to stutter/lag or drop in frame rate for some reason. On some occasions, it'll lag throughout the entire video. This doesn't happen on my old laptop…

Also, every time I log on after my laptop has been on hibernate or sleep, backspacing, spacing, and scrolling is SUPER SLOW. I'd need to restart my laptop for it to be normal again.

Sounds like a RAM issue. You either have a lot of bad sectors or not enough RAM for what you are doing.

Anon It could be a RAM Problem but thae Y50 has like 8 GBs of RAM. Do a virus scan and blow out the dust from the laptop.