System update / security, How can i find important updates for my computer – Sony VAIO VPCF11 User Manual

VPCF119FX, VPCF114FX, VPCF11LFX, VPCF11GGX, VPCF116FX, VPCF11QFX, VPCF11KFX, VPCF111FX, VPCF11JFX, VPCF11CGX, VPCF119HX, VPCF113FX, VPCF11FGX, VPCF1190X, VPCF11EGX, VPCF112FX, VPCF11HGX, VPCF117FX, VPCF11NFX, VPCF11AFX, VPCF119GX, VPCF11BFX, VPCF11DGX, VPCF115FM, VPCF11MFX, VPCF11PFX