Windows 7: WiFi Driver on Sony Vaio VPCF11M1E - F Series

I have recently had to do a re-format of hard drive and re-load system. Did not make any back-up discs. Purchased a new Windows 7 CD as other version OEM was lost with format. How do I update system with all necessary drivers...? How do I get driver for the internal wifi...? (The wifi only works if I use a plug-in usb item.)...
The only help I seem to get is with Driver Update Programs (that you have to pay for) great but, will this solve the problem...?

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Sony eSupport - VPCF11MFX - News & Alerts

This is the Sony Support Site for the USA, so you may need to try a different region if you live elsewhere and double check I've used the correct model number.

You can also ask Sony to provide you with a set of recovery discs for your computer. Just tell them you were unable to create your own and they may not even charge you.

Pebbly's post below has the link for Sony EU.

Hi ajmbwas, Welcome to the forums , Here is the link to the original installed drivers VAIO : Sony Europe you have 2 options for the WiFi Intel or Atheros if you are unsure of which one is installed just try both