Hi zisan,
you have left the rest of us readers in "no mans land". You have to provide us with more information:
-type of computer
-op. system
-graphics card
-computer's memory capacity etc
The problem could be as wide as:
-not enough memory
-softwares needed to be updated (op.system, AC or WIBU)
-problems with graphics card
- virus software causing it etc.
Start of with reading the "Read Me" file in the ArchiCAD's program folder to make sure your computer has what it takes to run AC 10 to begin with ...
... and add AC / computer specifics in your signature for others to get info from
