Barbie, you should be able to move all of your data to a new Mac, no problem. But most of the programs would need upgraded to run on OSX which comes on the new Macs.
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Turtle, first make sure both of the anti-virus programs are uninstalled completely from your system. Then pick one, you say you like AVG so lets use that one. Make sure you are downloading the
AVG Free and not the AVG trial. Install that -- then when it asks for updates make sure it knows you are using a dialup then be very patient when it gets those updates as that will be the first one and may be rather large adn take some time.
If Housecall gave you a clean test then you are likely free of viruses. But getting popups saying you have some kind of bug is almost always a sure sign of some sort of malware/spyware/trojan. Most AV scanners don't consider those viruses so you need to find a scanner that will find and remove that stuff - which is a very tough act. Try them all - AdAware, Spybot Search and Destroy, Microsoft Defender, Spyware Blaster, etc... But the only sure-fire way to get spyware off your system is a clean format and re-install of your OS. Good luck with that. As long as you use Internet Explorer and are not blocking
all but trusted sites you are going to get infected. Again and again.