Hi my name is ***** ***** I will be the expert working with you today to help resolve your problem.
when did it stop working completely and when was the last time it was working fine?
around 3 days ago i had firefox not work and now chrome stop working yesterday
Click the start button >>>then select all programs>>>> then select accessories>>> after that select system tools>>> and then system restore.
It opens the system restore windows select the option restore my computer to an earlier time and hit next then select a bold date a back date when the system was working fine and follow the onscreen process.
let me know how it goes.