Actually, this should be the latest driver for your system. One usually will have to uninstall the OEM graphics driver before installing an Intel generic driver.
http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&ProdId=2991&DwnldID=20602&ProductFa mily=Graphics&ProductLine=Laptop+graphics+controllers&ProductProduct=Mobile+Intel%c2%ae+4+ Series+Express+Chipset+Family&lang=eng
Came back to help others in my situation,
Finally I called Sony,they went through a total different approach than this forum,they help me to upgrade driver, these intel drivers are made by Nvidia, so they upgrade the driver by first removing and than reinstallting the new one, will not recommend someone to do this on their own, keep this as your last option, first try all other ticks.
they ran malware, final culprit was internet security software, blocking the cookies and pop up blocker, as soon as cookies were allowed and pop up blocker disable, everything went back to normal.
Vista 64 bit pc, using IE 32 bit, also in IE reset your personal setting under internet options, internet and trusted sites, custom level and reset. I hope it helps.