Why am I only able to type the letters A and B or numbers 1 and 2?

This behavior is caused by the Keystroke Encryption feature of Trend Micro Internet Security Pro 2009 software on the client computer. To resolve this error, please perform the following steps:

  1. Click on the arrow on the Keystroke Encryption icon on the Trend Micro Toolbar.
  2. Click on Disable.
  3. Restart your internet browser.