Personally, I would take all the important info off of the computer. i.e. burn it on a disk or use a portable hard drive. Reformat the whole hard drive. It sounds like there may be many things wrong with the computer including spam ware. I would then highly recomend them to get a decent virus protection program. Reformatting the computer is the best and easiest way to rid your computer of those things IMO.
Modems and routers go out also. You can unplug them for 5 mins to soft reset them, but it sounds like more of a computer issue. Viruses can change the browser settings to work in their favor.
Modems and routers go out also. You can unplug them for 5 mins to soft reset them, but it sounds like more of a computer issue. Viruses can change the browser settings to work in their favor.