Follow the below steps to make your Windows 7 PC boot faster.
Click your Start menu and type “msconfig” (without the quotes) and press Enter.
Click the Boot tab.
Click Advanced Options
Check the “Number of processors:” and “Maximum memory:” checkboxes, choose the number of processors in you PC, and select the maximum memory you want the boot process to utilize.
Click OK
Reboot your computer now or later to apply the changes.