For more than a week, everything have been running just fine, but now every time I try to open a Metro app it crashes after a few seconds of loading. Probably it's because of the Watermark removal tool, but even after I restored the files the apps crashed, then I turned the UAC back to highest settings (I didn't turn off UAC from regedit, so it wasn't completely turned off) but it was still the same. I also read in one of the topics that it was because some Microsoft codecs weren't available in the Enterprise version, but then how did they work before? I also installed the updates from Cesidian, which were supposed to fix these problems. It might have something to do with the graphic settings, because Store and Wikipedia still starts, which are not as fancy as the music app for instance. Maybe some bad settings between the integrated Graphic card and the nvidia one. My specs are: i7 3610QM (HD 4000 GPU) 4GB RAM 660M GTX Windows Enterprise X64 (non N)