can't draw quickly !

Hi … i’m using Toon boom harmony 10.3 for about 2 years, and i wasn’t have any problem until i re set up Windows 7 yestrday, the problem is: when i draw by Pencil tool or Brush tool. it not draw quickly… it’s really very very slow … so can you help me quickly please because all my works was stoped !!
( And very sorry for my bad English ! )

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Hi ahmed khairy

By looking at it, it is related to the video card.
Is it the same system before or new system?
Have you updated your video card driver?
Also if you are using low-end video card model, please try disabling Windows Aero ‘glass’ theme to compensate the video card resources.