Which OS have you got.
Some of them are programs - for instance, realplay = Real Player and I think msnmgr is MS Messenger.
In 98 you could close all except explorer and systray, but try right clicking prorams in your systemtray (bottom right) and closing them.
Go to start ---> Run and type in msconfig. Choose the startup tab.
Uncheck all the programs that you don't want to start when the PC boots up.