Download Mark Russinovitch's "Process Explorer" from Microsoft Technet -
https://technet.microsoft.com/en-us/...sexplorer.aspx
Free, safe, from MS itself - it will give you a far better idea of what Windows is doing with it's time than Task Manager.
Svchost is, as it's name suggests, a host process that manages an assortment of guest processes, and it is quite normal to have several instances of svchost running at the same time, each managing a different set of guest processes.
Process Explorer is a great tool for seeing what Windows is up to, and once you get get to know what is normally running, a great tool for spotting and exploring unexpected stuff (which might be malware or time-waste-ware).
Out of the box, Windows runs a great stack of services and processes that your OS auto-starts even it you are unlikely to use them. It is easy to tweak services to start only when they are actually needed.
Have a look at the famous Black Viper's site (lots of info and easy to understand) and you will be able to speed things up considerably by simple and reversible means -
www.blackviper.com/
In spite of his odd moniker, Charles is wise in the ways of Windows and has a lot of good tips and tricks.
Good luck!
Mac