yes the ? was addressed to you ,it been years since i use Opera,and if i remember correctly it came with an advertising banner[using valuable bandwidth] unless you buy it.and i don't use IE7[ created for Vista] i have IE6 on here ,but use firefox as my default .You really do need more ram,and your CPU is small in comparison to what winxp and the internet and all its new updates are meant to run on.
also did you run the online virus scan i posted .