Ha! I had forgotten about this
. Recently Lenovo has had to remove all links to the PC Doctor diagnostic utilities as they did not renew their contract. Lenovo is in the process of transitioning to another diagnostic suite. For now, the 1ETY48WW.EXE file is up on my site, along with the version of PC Doctor for DOS for the X20-X24 systems (PC-Doctor DOS #91; Version 2.0.1250). For years I've also been hosting the T2x and 600X versions as well. When I get some time I'm planning to put up all the other copies I have, which may not be the latest versions, into the same directory and get around to posting a web page where you can select what you need.