Just some info on the tasks you were concerned about.
adskscsrv.exe - this is normally a service associated with autodesk licensing
csrss.exe is the main executable for the Microsoft Client/Server Runtime Server Subsystem. This process manages most graphical commands in Windows. This program is important for the stable and secure running of your computer and should not be terminated
msnim.exe, not tottaly sure about this.. could it be msnimn ? msnimn is outlook express. MSN Messenger is msnmsgr.exe
Wuauclt.exe is a process managing automatic updates for Windows
smss.exe Windows Session Manager SubSystem and is responsible for handling sessions on your system
udserve.exe is normally the Undelete program from Executive Software. May be worth checking for the latest update. This can use up lots of resources.
services.exe is a part of the Microsoft Windows Operating System and manages the operation of starting and stopping services. This process also deals with the automatic starting of services during the comptuers boot-up and the stopping of servicse during shut-down
lsass.exe is a system process of the Microsoft Windows security mechanisms
svchost.exe - best to read this article at Microsoft.
http://support.microsoft.com/?kbid=314056
Hope this helps some.