Unable to access links in e-mail

All the links in e-mail or any other place will not respond. I wanted to buy a hot deal but when I clicked on "go here to buy" nothing happens.
I have an hp pavilion and windowsXP and it is 18 months old. I called a tech company,he came to my house four times and still couldn't repair my hp. I called again an requested another tech, he wasn't able to repair my hp either. I need help, badly. Thanks Donna