I have a Pentium 4 3.6 GHz, D945GCR Intel board, no external graphics card and 1GB ram pc. Recently I got it upgraded from Win 7 to Win 10 (after years... only to see how it works!). But I can't do "heavy" or multitasking jobs any more, which is normal. But then I tried to get Win 8 and still video playback for all file types is non-responsive.
What should I do? What could be the best possible OS (can be Linux distros or anything)? Also can I upgrade RAM or graphics or any other tweaks?