You can FORMAT your system or just install XP over Win98 NOTE: Windows wont allow you to do this, so install windows in DOS mode. Microsoft and most ICT pros recomend FORMATING though. So I suggest formatting
the difference between an upgrade and full install is as follows:-
upgrade:- it will upgrade to windows xp taking all your existing programs and files with it. so if you need any files / photos you will be able to access them. any older programs or compatbilty issues windows will warn you about, you may have to re-install some programs again it will tell you.
full install:- you are starting from scratch and will have only XP installed, i recomend that you format disk first, you will then have a clean stable installation. all existing files and programs will be lost. only do this if you don't need existing files, and you have accesss to software that you want to install either from disk or access from Internet.
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