Using registry/disk cleaners (CCleaner, SpeedUpMyPC,etc) in the Windows 8 Developer/Consumer Preview will result in the absence of both the app store and the metro/immersive Control Panel being unavailable in your installation. Luckily, I have found a fix for this problem. But first, a summary of why it happens: CCleaner (and any other registry cleaners) that scans for invalid shortcuts or application path references will delete three keys required by Windows 8 to display the metro CP, Windows Store and metro Remote Desktop. These keys are as follows: Please note that in CCleaner, the problem arises when the user scans for invalid Start Menu/Desktop shortcuts from within the cleaning dialog, not the registry scanner. C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Windows Store.lnk\C:\Users\Mitch\Desktop\notused C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Immersive Control Panel.lnk\C:\Users\Mitch\Desktop\notused C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Accessories\Immersive RemoteDesktop.lnk\C:\Users\Mitch\Desktop\notused So when using ANY registry cleaning software, be sure to look through the scan prior to removing keys and UNSELECT these three "invalid" shortcuts. Although, I still don't understand why this made the apps completely inaccessible (via some external links in the normal CP, etc) and quite frankly, I don't care. To solve the problem, run CMD as an admin and type "sfc /scannow" which will see the files/references are missing and repair them. Thanks for your help guys, and I hope this solves the problem for others as well! Mitch.