Hi sallyee,
Welcome to Sony Community!
Are you running Windows 10? VPCF11GGX came with Microsoft® Windows® 7 Professional 64-bit and we do not have Windows 10 drivers for this unit: http://esupport.sony.com/US/p/model-home.pl?mdl=VPCF11GGX&template_id=1®ion_id=1&tab=download#/downloadTab. Windows 10 won't work well with your computer.
If you're still running Windows 7, you may follow the steps here to isolate the issue:
- Power cycle - Remove the battery and all peripherals -> press and hold the power button for 5 seconds
- Set BIOS to default.
- Try the unit in Safe Mode.
For further assistance, we kindly recommend visiting our Sony Global Website for information on contacting the Sony Support Center in your region at http://www.sony.net/SonyInfo/Support/.
Regards,
Vincent
If my post answers your question, please mark it as "Accept as Solution"