I tried to install a clean XP SP3 VM, and then install all the updates available. After that, i ran HFNETCHK, in that VM. It shows me the same error. Why?, i ran the hfnetchk in several machines and i obtained the 956390 error in all of them. Maybe a language problem (i'm using the spanish version of WinXP)? Or a problem with the HFNETCHK tool? Can you, people, run the hfnetchk tool in your machines, and look if the hf 956390 is correctly installed? http://hfslip.org/support.html Thank you.