This may be a long shot due to me using the Release Preview of Windows 8, but basically some of my programs have stopped showing the dialogue box for Save, Save As or Open. This happens in Office 2010, Firefox 14.0 and Adobe Acrobat X Pro, however other programs I have installed including Photoshop CS6, AutoCAD 2012 and 3ds Max 2013 all work without issue. I have considered that the dialogue box may be off screen, and tried pressing Alt+Spacebar -> Move and using the arrow keys to move, but this just moves the program window. It really is ad if I haven't pressed Save/Save As or Open at all. Very odd. I've also tried recovering Office, but the fact that this issue is happening across multiple programs, one of which I only installed the other day due to not being able to save in Word (tried to save a guide from a website in Acrobat instead), then it appears to be a Windows issue. I've done a full virus and spyware scan using Defender and Malwarebytes, but both are clean. Finally, I've tried creating a new user profile, but the same issues there. Unfortunately I'm not sure I can use system restore, because I know the issue has been present for a while in firefox, but I put off looking for a solution due to uni work, and didn't realise it affected other programs as well. This might just be side effect of using a Release Preview version of Windows, and maybe a full OS re-install is the only option, but thought I'd check here first. Thanks in advance for any help.