Laptop is slow, getting hot, take ages to start
I would say its the common problem , after time the laptop if full of unwanted files programs and all sorts.
Probably the cooling fan is blocked and thermal paste is dry.
It needs a service .
What you have to do first is to fix the problem with overheating, get into your laptop and clean all inside , then replace the thermal paste.
Now at least you know that will not overheat itself especially when you need a lot of time to clean your system and sort the system problems.
Sometimes takes ours to do that.
To run few cleaners and anti-malware takes a time.