Laptop Laggsss alot. Lenovo Ideapad 305?

Laptop Laggsss alot. Lenovo Ideapad 305?

Added (1). My Laptop Was fine when i was on windows 8 it started to lag when i upgraded to windows 10. The Disk usage is 100-90 at startup and when opening programs etc. It takes about 10 mins on startup to get stable. Also my laptop specs are:
Lenovo Ideapad 305
Core i5-5200U (2.20ghz 2.20ghz)
4Gb of Ram
1Tb harddrive hhd 5400rpm
64bit operating system.

Not enough info.

Lenovo computer's suck. End of story. They are so bad that they are my schools computers.