Precautions for installing winxp system in Lenovo S5-S531 notebook

First, connect to the boot USB flash drive and choose to start it from the USB flash drive. It seems that it has been protected. After learning about it, it turns out that BIOS protects the boot mode by default. You have to modify it:
1. Enter BIOS -- security -- secure boot conctrol and set it to disabled.
2. Go to BIOS -- Startup -- open CSM (compatibility module) and change boot mode to Legacy (first step)
3. Go to BIOS -- devices -- ATA drivers setup -- configure SATA as and change to Composite mode to save
4. Go to the pe system and switch the hard disk from the GTPS mode to the MBR mode.
In this way, you can install the winxp system. There is no other difficulty. Lenovo also provides the xp driver for this model. In fact, you can install the driver of the NIC, then download the Lenovo driver automatic installation tool to automatically download and install the driver online, which is very convenient.
The following link to your Lenovo driver search site: http://support1.lenovo.com.cn/lenovo/wsi/Modules/Drive.aspx? Intcmp = I _F_Driver