This is usually due to .NET Framework 2 not being installed. Please download and install the Framework from Microsoft here. Then try running Keyword Examiner.
2. What do all these numbers mean?
Please read the User Guide for a full explanation of what each column in the Keyword Examiner data shows. It explains how the data is gathered, what the numbers represent and how the KEI scores are calculated.
3. Why does a box with funny letter and numbers appear either when I'm using Keyword Examiner or searching on Google afterwards?
This is Google's CAPTCHA code, used to stop automated programs from using too much of Google's resources. You will need to enter the code as you see it to continue. This is an unavoidable symptom of using Keyword Examiner and usually occurs after around 200 searches have been performed. If you don't use Keyword Examiner too heavily, you may never see this code. It is usually reset a few hours later and you won't need to enter the code any more.
For a further explanation, please see the User Guide.