Hello all, I installed a Windows XP x86 on my PC. But when I open the system information window in the System Summary tab, in the right-hand pane and at bottom the following are written: Total Physical memory 768.00 MB Available Physical memory 270.41 MB !! Why Available Physical memory is 270.41 MB please? PS: My system is very slow and also very slower when start up. Isn't that less Available Physical memory the source of that slowness?