XFolder requires at least OS/2 Warp 3. It will NOT run on previous versions, for it calls OS/2 API functions not present on OS/2 version 2.x and before.

I have tested XFolder with the following configurations myself (all German versions):

- OS/2 Warp 3 no fixpaks installed
- OS/2 Warp 3, fixpak 35 installed
- OS/2 Warp 4, no fixpaks installed
- OS/2 Warp 4, fixpaks 5 and 7 installed

I strongly recommend installing newer fixpaks. See the FAQ section for details.

Note: I was reported that installation fails under Warp 3, fixpak 31. In this case, you should install a newer fixpak.