What is svchost.exe? When I open task manager I have about 4 on there with huge amounts of space. When I tried to research it, some locations said it was a trojan and others indicated that it was normal.

If it is normal, is there anyway to decrease the size?

It is part of Windows.
Svchost.exe is a generic host process name for services that are run from dynamic-link libraries (DLLs). The Svchost.exe file is located in the %SystemRoot%\System32 folder. At startup, Svchost.exe checks the services portion of the registry to construct a list of services that it needs to load. There can be multiple instances of Svchost.exe running at the same time. Each Svchost.exe session can contain a grouping of services, so that separate services can be run depending on how and where Svchost.exe is started. This allows for better control and debugging.
SVCHOST-2000
SVCHOST-XP

btw.... I'm running Win2K Pro & have 4 of them under my task manager as well.

The copies of Svchost.exe in the Windows\System32 and Windows\System32\DLLCache folders are the legitimate Windows program. Instances of the file anywhere else are viruses.

Thank you cswchan & TomGL2