I know SP3 and windows cant handle different scaling percentages to different monitor, it all has to be the same. I didnt know this, otherwise i wouldnt have done it. I wanted to scale my desktop on my SP3 screen from 100% to 150% as 100 was just not bearable. Prior to this i was able to run 2 ext monitors off my SP3 no problem. What happened was I scaled my desktop to 200% at first (to try it), signed out, back in, it was too big so I went to 150. Picture showed on both ext monitors plus the SP3 one. After i readjusted to 150%, i signed out, back in and picture showed on one of my ext monitors and my SP3 one but not the other. I tried everything - I diagnosed that it wasnt the monitor or its USB video adaptor that its running off of. I plugged both monitors into another laptop and worked fine. For some reason even though i even tried setting the scaling for all 3 monitors to 100% (what it was at before), windows still has the last sscaling percentage remembered for that 2nd ext monitor im trying to get picture out of. Windows reconizes the monitor but just wont display a picture. I tried going back to the original scaling (100%), even tried disabling the SP3 screen altogether. Nothing. How can I get windows to dump the memory setting its currently holding for that monitor? I had this working before, theres no reason why i cant get it to work again. This scaling problem and the fact you cant scale each monitor at different percentages is a huge problem for windows. Cause I prefer 150% on my SP3 screen (anything less is too small), but then it makes the picture on the ext monitor way too big. Uhhh.