BleepingComputer.com: Qs regarding Dll, svh & rundll

thanks guys for running a really helpful forum....

i would like to know more about the rundll, svhost and dllhost (com surrogate)

i have included a screenshot , would anyone like to point out if there a suspicious process running!

are the above processes imperative to run? alot of svhost processes are in the list, and some blank ones as wel without command line and path....and com surrogate process! what is the purpose of that? ..thanks

rundll.exe is a Windows System process belonging to the Windows 95, 98 and ME range of Microsoft Windows products. This is an important system process and should not be terminated.

What is svchost .exe And Why Is It Running? - How-To Geek

dllhost.exe is a process belonging to Microsoft Windows Operating System. The dllhost.exe file manages DLL based applications. This program is important for the stable and secure running of your computer and should not be terminated.