I have tried again to install Win-7 64bit ultimate by booting and adjusting the Bois setting from csm to UEFi boot, booted fine and while win7 installation in progress no drivers were identified (you cannot see any drivers). Originally it has a pre-installed Win7 premium, I have formatted the laptop and tried to install Win7 ultimate but did not work, after headache I have temporally decided to install Win8.1, it worked well. My problem starts with installing Win7-64 bit on my Toshiba Satellite laptop, U845W-S400, 500 hdd/sdd, 4Ram.

The Toshiba website contains all necessary Windows 7 drivers for this model.Hi everyone, I am new to this site.

Select the large partition as the destination of Windows 7.

Create one partition (Windows will create another 100MB system partition for itself).

Delete all partitions on the hard drive.

The computer will boot from the Windows 7 DVD.

On the Exit Saving Changes window press Yes to save the changes.

Press Enter on Boot Mode and select CSM Boot.

Press Enter on the System Configuration.

Select the Advanced tab on the top of the screen.

Press Enter on the Secure Boot option and select Disabled.In the BIOS setup select the Security tab on the top of the screen.In the boot menu select Enter Setup and press Enter.Press the power button and continuously tap the F12 button to open the boot menu.To completely shut down Windows 8 follow the steps in How to completely shut down Windows 8. When you select “Shut down” on the Windows 8 screen the computer only goes to hibernation mode. Completely turn off the laptop to access the Toshiba BIOS Setup.Insert the Windows 7 DVD into the DVD drive.This will allow the computer to boot from the Windows 7 DVD.

The first step is to turn off UEFI in the BIOS and enable the legacy boot. If you want to remove the preinstalled Windows 8 from a new Toshiba Satellite P50-AST3GX2 laptop you need a Windows 7 DVD.

Toshiba window 7