ub_lue,. Thank you for using the Dell Community Forum. Dell has no Win 7 drivers for this system. What is happening is it needs a SATA driver. To get around this try booting into the system bios and change SATA Operation to ATA or AHCI. Whatever it is not set to. Save the changes and then try installing Windows 7. Once it is installed go back and change this setting back. Let me know if this resolves your issue.
Hello all I'm running an Inspiron 1721 with the following spec: 2x AMD 64 (2GHz) and 320GB 5400RPM SERIAL ATA RAID 0 STRIPE I'm currently running 32-bit Windows Vista and I'm trying to custom install to Windows 7 32-bit. All system requirements have been met however, the following issue occurs every time I try to install. I have tried installing from CD and from a USB boot but I get the same issue each time: Upgrade install: when checking compatability the system asks me to upgrade the drivers for my SATA RAID controller. When I try to upgrade the drivers,Vista informs me that they are up to date, so I can't go anywhere with it.  Custom install: as a direct result of not being able to use the drivers for my RAID controller, Windows 7 cannot see any of my drives and so I am unable to install the new OS. I have tried customer support who have been 100% useless, and I'm left wondering why the hell I paid out loads of money for a 4 year extended support warranty on my laptop. Can anyone help me? Lue  
Problems installing W7 32-bit on Inspiron 1721