It cannot be stopped or restarted manually. This process manages system services that run from dynamic link libraries (files with extension .dll). Examples for such system services are: "Automatic Updates", "Windows Firewall", "Plug and Play", "Fax Service", "Windows Themes" and many more.
some svchost.exe can't be stopped you need to disable it in the services.msc
I am using the same laptop and me too facing the hanging issue. However, in my case, the system gets too slow as soon as i switch on the Microsoft Outlook. Maybe it is due to almost full hard-disk (only 10-20% space in each drive).