O artigo SecureCRT 6.5 e Barra de Tarefas do Windows 7 pode estar relacionado a este problema:
To disable Aero Peek functionality within SecureCRT, follow these steps (assuming you're running SecureCRT 6.5 Official release or later):
Browse to the location of the SecureCRT configuration folder as displayed in Global Options, General, Configuration folder.
Close all instances of SecureCRT (and SecureFX, if you're running both apps on the same system with an integrated configuration).
Edit the Global.ini file and change the following line From:
D:"Disable Aero Peek"=00000000
To:
D:"Disable Aero Peek"=00000001
Save your changes to the Global.ini file and start SecureCRT.