I recently purchased a new computer and changed from a vista system to windows 7. When I try to draw a line, pick the line command, and before it is active I get a series of blue triangles when I move the courser.

The triangles disappear when I zoom or move or rotate. Very disturbing. By the way, I also installed a new nvidia graphics card model GeForce GT 520, could the card be the problem? I did not have this problem before I bought the new computer and installed the new graphics card.

Thanks in advance,

Sonny Perschbacher