Personalization windows

Such problem: after reboot PC was included simplistic style, as I thought in the beginning. The reality is much worse and more complicated. Style is not just changed to this misery and began to work with a delay: the window open slowly. In addition, even worse, started to lag monitor: the horizontal gap around the image, and in videos and games, watch no play with this problem is simply impossible. It seems that the problem is not complex, set basic laptop for performance, and of course went into advanced system settings to disable it, but it was not there, everything as it was. Okay, I thought, went to personalization, change the theme, changing only the cursor and a little frame, Windows and of course the problem with the gap has remained. In General, poprobyval all he knew, not helped, who knows, who faced, or just someone who knows what you can try to email, I would be grateful