Click Star and click Run, type msconfig , then click OK.
You will see something like image below :
On General tab you can select one of this :
- Normal startup : load all device drivers and services
- Diagnostic startup : load basic devices and services only
- Selective startup : your own settings
Launch System Restore : create a restore point or restore back to a restore point.
Services will show on another tab named services. This tab allow to set up the startup of this services.
Now press Restart.
You must be careful what programs you started and what not.