You will need to check that the device will support the older OS, many major manufacturer's are no longer developing drivers for Windows 7 on Newer equipment. There may be generic base drivers available depending if the laptop is made for the business market, or you can manage with basic drivers from the individual components makers.
The best thing is to check if Lenovo ever supplied the exact model you have with Windows 7 Installed - obviously if this is so then the drivers should still be available but you would have to source them from Lenovo yourself - check the support pages for your model