This one is really old, from A5 days GTSPAcker, and will not work on newer windows. Maybe you mean on 3DGSPurePacker? I don't know did this packer will work on newer windows, but try and let us know . Just to know, if you want protect your files, stay away from this packer, it can be hacked in few second.
. Just to know, if you want protect your files, stay away from this packer, it can be hacked in few second.