SVCHOST.EXE definition, relationships, removal:

svchost.exe is a system process which belongs to Microsoft Windows. Svchost.exe handles processes executed from DLLs.
This is essential system process and can not be terminated. Its important for the safe and stable run of the computer system.

However: various parasites tries to exploit this name and similar names.
there is W32.Welchia.Worm which takes advantage of the Windows LSASS vulnerability, creates a buffer overflow and instigates your computer to shut down.

Other similar names exploited by the parasites: svchosts.exe, scvhost.exe, scvhosts.exe, svchostc.exe, xsvchost.exe svchost.exe.bak and others.

Be careful and look at the name correctly.

other exploits:
File svchost.exe is related to adware 2020Search.
File svchost.exe is related to keylogger Employee Watcher.
File svchost.exe is related to keylogger ICE Remote Spy.
File svchost.exe is related to keylogger Is My Mate Cheating Online.
File svchost.exe is related to keylogger Key Logger Buddy Pro.
File svchost.exe is related to keylogger KidWatcher.
File svchost.exe is related to adware Litmus Trojan.
File svchost.exe is related to keylogger Spy Software 4 Parents.
File svchost.exe is related to worm W32.HLLW.Repsan.
File svchost.exe is related to worm W32.Welchia.B.Worm.
File svchost.exe is related to adware WinDir.svchost.