PC Game: Soldiers, Heroes of WW2. Is the game copy protected as it won't run on W7 x64

[Oddjob 0]

Just found this old game lurking in a cupboard and thought I'd reinstall it as I'd always liked it.
Since my last install I've upgraded to Window 7 Ultimate and it's running in x64 mode.
However, the game installs BUT everytime I try to start it I get a computer must restart to complete installation message. There seems to be some sort of copy protection going on but the game's a genuine copy, Windows is also genuine, nothing on the PC is pirated, don't believe in stuff like that.
I've tried to run the EXE file in compatibility mode but nothing works.
I'd really like to play this game again so try and help out if possible.
Thanks.