The above symptom may occur to the following systems: Lenovo G40-30 Notebook Lenovo G50-30 Notebook
The above symptom may occur under the following condition: Running Windows 7 Setup disc / USB key
Shutdown computer. Press NOVO button, then press Arrow down key to select [BIOS Setup] and hit the Enter key.
If the BIOS version is lower than A7CN27WW, please update BIOS to a7cn48ww or above. You can download the latest BIOS from here. Copy a7cn48ww_32.exe to the root path of your FAT32 format USB disk. Try to boot to your USB disk via Novo button or press F12 while booting. Click a7cn48ww_32.exe to upgrade BIOS to A7CN48WW.
Switch to [Exit] page. Select [OS Optimized Defaults] and set to [Win7 OS].
Select [Load Default Settings] and select [Yes].
Press arrow key to switch to [Configuration] page. Select [USB Mode] and set to [USB 2.0]. After Windows 7 installation, please upgrade USB 3.0 driver and change back USB Mode value.
Press arrow key to switch to [Exit] page. Select [Exit Saving Changes] option and select [Yes] to save the changes.
When Lenovo LOGO appears, press “Fn+F12” to enter “Boot Manager” menu, select the USB key / ODD to setup Windows 7.