Hi my name is ***** ***** I will be the expert working with you today to help resolve your problem.
what is the make and model number of the laptop which is not connecting to the internet.
Do you have a lan cable?
you mean your yahoo email or yahoo search.
if its the yahoo email and not other sites running dead slow that means the bandwidth of yahoo email service might be having issue you may try clearing the browser cache and deleting the dead browser cookies.
Try and let me know how it goes.