Hi all New to this forum plus Win 8, so bear with me. I have Win 7 on my desktop which I use most of the time, but just got a nice new Asus S56C notebook with Win 8 installed. After eventually figuring out how to revert to the Win 7 desktop I've spent most of my time there, despite the system continually flinging me back into the Win 8 Start screen. I'd managed to get both PCs networked & installed Firefox with a backup from my Win7 machine (using MozBackup) if that makes sense. In other words not a fully clean version. All was fine until I started it up this morning (from a full shut down, not Sleep) to find that the Win 8 Start screen had lost almost all its tiles bar the Desktop, Store & PC config tiles. And then when I went to open Firefox it came up with the "Firefox is already running..... you must first close it or restart..." msg. Ok I thought - so fired up Task Manager to shut it down only to find no trace of it anywhere. Numerous retries & a fresh installation haven't solved the problem. It also wouldn't let me uninstall it out of Programs saying that the program was already uninstalled. The only possible connection I'm wondering about with this, is that I set it up using my Guest WiFi network but then last night had to switch to my main network in order to connect the 2 PCs - is that likely to have anything to do with it?? Otherwise I can't figure anything I could have done to cause the problem. Apologies - I know it's a bit confusing having to fix 2 totally different problems but hope perhaps someone will have some ideas - the Firefox one being the more improtant. If all else fails I'll just revert to factory settings (if that's even possible) and reset the thing completely but would rather not as it's a review machine. Thanks.