May be becuse your Computer CPU cant handle the stuff that u are useing all the day or maybe its just too old or viruse make it freeze ir mybe its just Full of stuff date. Files what evere you are using.
...So there r few salutions that i can help with:
Upgred PC, or
Buy a New One,
Make sure your PC doesnt have physical damage, clear the storge if its Full and use extenral HDD.
Unitall it and i mean remove every thing... İn case u dont konw how to deal with viruses.
And take care of ur PC, like it has feelings and it will sick if u dont take cere of it LoL but bleave me dud moust of proplm we are wh makeing it.