Hi Tony, Zec at al, long time since I have been on here. 2019 world edition of DVD not installing. Anti-virus all off, all background programs shut down, running as Administrator, plenty of room on D: for the install, plenty of room on C: for temp files, tried copying files off DVD to desktop folder but copy failed for both DVD 1 and DVD 2. Machine is up to spec and running TANE SP3 very nicely. Have come to conclusion that the DVDs could be faulty. Any other suggestions? I have been with Trainz from the very start and I never cease to marvel at the difficulties in getting each version set up properly.