Nobody can tell you anything without proper system info or other technical details. This is obviously a graphics issue, so check your drivers and configuration.
What OS do you have? What GPU?
What version of AE did you have that worked?
I've seen sniffer errors happen very frequently for two things:
First thing is someone is trying to run AE on Windows 7, but Windows hasn't been updated to Service Pack 1
If you're running Windows 7, make sure it looks like this:
The second thing is if someone has an Intel or AMD graphics processor and tried to install CUDA on it. Avoid installing NVIDIA CUDA drivers on computers with AMD GPUs