I have Windows 10 Home x64 running on Dell Inspiron 3537. All the drivers are ok (sidetrack; gave it on a warranty service, hdd failure; they put a new drive in and reinstalled it with win10 home) and for the first few days, it worked great. Then came the problem. Whenever I close the lid or put the PC to sleep, it will sometimes go to sleep, but sometimes everything will shut down (hdd, wifi led etc.), but the fan will stay on and the pc will stay in on state instead of sleep (power led blinking) state. Same is for shutting down: sometimes it will shutdown ok (it takes up to 10-15 secs) but sometimes it will stay on indefinitely. Any help would be appreciated.
Edit: the windows installation is brand new and as i said, it sometimes shuts down / sleeps and sometimes it doesn't; i can't see what is the problem