if you install the software in a new user
open the terminal and give permission for the folder ITexam. For this
open the terminal and type the command sudo chmod -R 777 /usr/share/itexam.
for checking the OS version- open the file system-etc-open the file issue.net and if it is 10.04.3 LTS then the os version is correct. otherwise update the os from resource CD supplied to u at the time of Std 10 textbook training
for IT school