i have used almost all the method today i made bootable flash with USB_prep8 and here is the procedure ...but same thing happen same error with sata enabled and by disablinng SATA controller it dosent install XP in any partition of my hdd SAYING ITS NOT A VALID PARTITION 1. Extract the two files above after the download has finished. 2. Go to the folder usb_prep8 that was extracted , then click usb_prep8.cmd. 3. At the command prompt screen that appears, press [Enter] and PeToUSB screen will appear. 4. Click the ‘Start’ to begin the process of formatting and don’t change any configuration. 5. Don’t close usb_prep8 and PeToUSB screens, just leave it open. 6. Open command prompt from Start -> Run, then type cmd and press [Enter]. 7. Through the command prompt, enter the directory/folder that has been extracted bootsect. 8. Type the command ‘bootsect.exe /nt52 R’ (without the quotes), replace ‘R’ with the appropriate USB Flash Disk drive letter. 9. Close the command prompt screen and PeToUSB screen, but leave usb_prep8 screen open. 10. Back to usb_prep8 screen and type 1 and then [Enter]. 11. Do browse according to the location of CD/DVD where the Windows XP installer is located. 12. Type 2 and press [Enter], then assign a drive letter (default T) and press [Enter]. 13. Type 3 and press [Enter], then type USB Flash Disk drive letter is located (for example F) and then press [Enter]. 14. Type 4 to start the process, then press Y and then [Enter] to continue the process. 15. Press [Enter] when “Press any key to continue” message appear. 16. Click ‘Yes’ if asking confirmation, the process will run about 15-30 minutes. just now i wiped all the partitions and created new .. but still same problem what log? do u mean boot.ini in my flash drive?