Laptop after 6 days of standby too slow?

Have an acer aspire 5755g

- samsung evo 860

-8GB RAM

-Geforce gt540M

-intel core i5-2430M dual core

I left my laptop last week and forgot to turn it off… Then I drove away. Today I see my laptop and turn it off. I then switched it on again and nothing happened until the fan started to air. Habs turned off again… Then turned on. I was able to start the laptop normally, etc… Was it just strange that the fan was full? I started task manager (which took a long time) and the CPU is fully utilized although no program starts or something was open. So I wanted to have a look on the internet… Has had a delay (normally every program starts very quickly) … After 10 min. Has the CPU calmed down (5-15%) But fan still runs at full throttle? Overall, the computer no longer runs smoothly: programs are delayed and run poorly and games jerky abnormally. I was always able to play smoothly dishonored (although the laptop never met minimum requirements)

So what can I do?

Use something like ccleaner and first clean the unnecessary cache and then simply restart again

First charge and leave in peace until the battery is full. Has something to do with switching off but nothing to do with the speed. Maybe he does some updates in the background. Let the PC idle for an hour. He gets back on his feet.

Take a look at the task manager to see which processes are responsible for the workload!

Could be that unused applications are started. This can be deactivated at autostart, for example with the CC Cleaner.