Alert! You have attached an undersized 45W power adapter to your system, which is less than the recommended 65W power adapter. To continue operating
DELL笔记本开机提示选配器电压
可以选 Contnue 忽略
也可以用下面解决办法
开机F2进入bios 或在提示界面选 BIOS setup
POST Behavior
下面
Adapter Wamings 右边 Enable Adapter Wamings 选项取消勾选
然后下面APPY应用 exit退出就可以解决了