How hard it is to upgrade Windows XP from SP2 to SP3? Do I have to go through Microsoft or can I just upgrade without going through them (by just downloading the file). Does the installation process require permission from Microsoft or some sort of spyware involved that would take my information?
You can use windows update it will update your SP2 with the latest fixes then it will do SP3. It took about 30 minutes for me. afterwards 25 or so more patches/fixes and your done. You can download an ISO of SP3 from Microsoft and make a Disk to load from. (you will need your product key for the 2nd option)