while i was innocently playing a game of civilization on the computer
after more than an hour the computer got stuck. with ctrl/alt/del i
found that a program called dsqrivs.exe was using 95% to 97% of the
CPU. now i would like to know what this program dsqriv.exe does,
because the computer didn't get out of it till i finally terminated
this program and even then my game was stuck.

Try this search on google : civilization game crashes
(://www.google.com/search?hl=en&ie=UTF-8&q=civilization+game+crashes&btnG=Google+Search)
Maybe some of those links will help!