This is a pretty common problem, although it's been a while since I've seen Topo 5 mentioned.
We've seen a lot of this since Vista came out and was put laptops. Vista is a resource hog. Combine that with lower-cost laptops that don't have dedicated video cards and share the limited RAM (kept low to keep the price low) and your computer will not be up to the task of 3-D processing.
Some basic questions to help others answer you:
- What processor and RAM do you have?
- Do you have a dedicated video card? If so, how much RAM does it have?
- Have you tried lowering your colors from 32-bit to 16-bit? What were the results?
- Have you tried combining the above step with a lower screen resolution (like 1024x768) What were the results?
- Have you loaded a "newer" driver from the video-chip company? If so, go back to the laptop manufacturer and get their latest driver, that actually solves many of these problems.
The simple alternative is to move the divider bar between the two panes all the way to the left, eliminating the left pane display.
If you change your resolution a lot, I recomend one of these two programs:
I use the first one, haven't tried the second.
Here is a similar thread: http://forum.delorme.com/viewtopic.php?t=16745