It could be any of four things (in my personal order of probabilities): "badly" slipstreamed SP3 however modified "improperly" SOURCE SP3 Russian Can you try a Russian "standard" SP2 to eliminate the SP3 and modified source variables? jaclaz Thank you for push me in right way. It been just a my mistake. I edit MBR manualy when try to run setup with just a grub4dos without winsetupfronusb. But in \WINSETUP\XPpSP..\I386\ a have the setup.ex_ when it did't work I check this first of all. Now it work with 0.2.3 and with 1 beta4, with Russian and SP3 . But in 0.2.3 I see first partition of my USB HDD (two partitions, first with setup Win and Linux and some service programs and second part with users backup, soft, manuals), and second don't have the Drive letter. It have logical partition and status "good" but all space is free. In other computers it's OK. And if use 1 beta4 it's OK. Restart and enforcement assignment did't work. My choice is 1 beta4. Thank you