Unnecessary startup programs and services can be deactivated by the 'System Configuration' in Windows 7.
1. Type 'msconfig' or 'system configuration' in the start menu.
2. Open the correct search result. If you typed 'msconfig', you'll have to click the 'msconfig' option under the 'programs' section. If you typed 'System configuration', you will have to click the 'system configuration' option under the 'programs' section. However, they both bring the same dialog.
3. Go to the 'startup' tab of the System configuration dialog box that opens up when the previous step is followed.
There, you will see the list of programs and services that start upon booting of Windows. You can mark them or unmark them as needed. Then Click 'Apply', afterwards click 'OK'.