What should i do if i cannot access the internet, Why is the data transfer speed slow – 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