DesignSpark Mechanical V2.1 and v4.0 are no longer compatible with Windows XP.
DSM version 1 (released September 2013) is no longer supported since October 2016 and we are not accepting registrations via this version.
The above decisions were taken on the basis of:
1. Windows has also ceased technical support for all XP builds & service packs and,
2. A newer version of DSM is recommended as it addresses security issues plus new design enhancements/performance.