You can use the Recovery Partition to do the System Recovery. You can access the Recovery Partition using the "VAIO Recvery Wizard" software installed in the Computer.
On the taskbar, click the Start button, point to All Programs , point to VAIO Recovery, then click the VAIO Recovery icon.
In the VAIO Recovery window, click to select the "Restore C: Drive" option to do the System Recovery.
Then, in the Restore C: Drive window, click to select the I understand box.
After that, click the Next button.
After the bundled applications are installed, under Restore C: Drive (Step 4 of 4) , click the Finish button.
The computer will restart and the operating system setup wizard will begin.
Please follow the on-screen instructions to complete the setup wizard.
All the best...
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