you can of course install QuarkXPress 8 on a new computer. However most likely the new computer will have an operation system that QuarkXPress 8 will not support, so you might run into some issues.
Minor changes in the version number are free of charge (like 8.0 to 8.5), whereas jumps of the main version number is a paid upgrade (like 8 to 10). Therefore your license of QuarkXPress 8 will not work to use the current version, QuarkXPress 2016.
However we have upgrade prices available for users from previous versions. Give us a call please:http://www.quark.com/Buy/QuarkXPress_Sa ... ice/#phone