Hi Some months ago I added a 32" samsung usb screen to my PC, my operating system is windows 7, This maybe coincidental and not at fault. Since adding the screen my Firefox browser crashes, what happens is the screen starts flashing and most of the display disapears you can click on some buttons if displayed or you know where they are but the only way to stop it is to close and reopen the browser, it seems to happen more frequently in a browsing session once its happend once, sometimes it dosn't happen. It seems to be triggered by the mouse scrolling wheel. I have removed and reloaded Firefox but still the same, when reloading it recognises the previous instalation and recalls some previous settings, I don't seem to be able to stop this happening. Lastly the fault does not occur on any other browser. Firefox is my default and prefered browser and I would like to cure this if possible, I have run virus scans etc and dont appear to have any contamination issues. Any advise gratefully recieved Many thanks Steve Hull