![Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support IN Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support IN](https://download.lenovo.com/km/media/images/HT117083/453e8d2e40074f4ba915b3b33ce9dc36.png)
Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support IN
![Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support US Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support US](https://download.lenovo.com/km/media/images/HT117083/3eb047b450664a9989687cc590b07cc3.png)
Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support US
![drivers - ACPI Error: AE_NOT_FOUND when installing/running any Linux OS - Unix & Linux Stack Exchange drivers - ACPI Error: AE_NOT_FOUND when installing/running any Linux OS - Unix & Linux Stack Exchange](https://i.stack.imgur.com/b8ikY.jpg)
drivers - ACPI Error: AE_NOT_FOUND when installing/running any Linux OS - Unix & Linux Stack Exchange
![Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support US Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support US](https://download.lenovo.com/km/media/images/HT117083/6233cf59dade45e9be8faf4ca2111d44.jpg)
Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support US
![Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support IN Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support IN](https://download.lenovo.com/km/media/images/HT117083/d3382643fbb241f2a880eb1edf96816f.jpg)
Device Manager shows an unknown device with a yellow exclamation symbol after recovering the operating system from Microsoft Windows 10 to Windows 7 - ThinkPad E460, E560, E465, E565 - Lenovo Support IN
![Stuck on AppleACPICPU while booting (I presume due to something wrong with VirtualSMC) : r/hackintosh Stuck on AppleACPICPU while booting (I presume due to something wrong with VirtualSMC) : r/hackintosh](https://i.redd.it/0fw7lyd5c3ub1.jpg)