Welcome to the forum. Down grade from what? If it's win10 is it a new installation or upgrade if it's upgrade you can role back for 30 days. If it's a new pc before you do anything you need to know if drivers can be downloaded for 7 often there are no drivers for 7 as it's no longer supported.
Why do you want to install a system no longer supported?
I have a Gaming PC that runs Windows 7 which is my main computer. My school laptop had Windows 7, but unfortunately died. So I bought a Lenovo laptop for school/tafe a few months ago which came with Windows 10. After using Windows 10 for a few months I have gained hatred towards the user interface and how everything works on it. So I need help trying to downgrade my Lenovo laptop to Windows 7.
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
Windows 11 Pro x64 [Latest Release and Release Preview]
CPU
Ryzen 9 5950X, 3.8 - 5.2 MHz
Motherboard
Asus Prime X570-Pro
Memory
64GB [2 x 32GB] DDR4 3200MHz
Graphics Card(s)
4GB NVIDIA GEFORCE GTX 1650 Ti
Sound Card
On-board SPDIF to 5.1 System + HDMI [5.1 system]
Monitor(s) Displays
32" UHD 32 Bit HDR Monitor + 43" UHD 4K 32Bit HDR TV
Screen Resolution
2 x 3840 x 2160 @60Hz
Hard Drives
1TB M2 SSD OS, 500GB Fast Access SSD, 2 x 8TB Data + Various Externals from 1TB to 4TB, 10TB NAS
PSU
NZXT C750 80 PLUS Gold 750W Modular PSU
Case
Workstation Case [Matt Black]
Cooling
NZXT Kraken X63 280mm CPU Cooler +2x Quiet Case fans
Keyboard
Logitech Wireless MX Keys & K400 + others
Mouse
Logitech Wireless MX Master 3S
Internet Speed
920 MB Down 50 MB Up
Antivirus
BitDefender Total Security Pro
Browser
Chrome (always run latest Non-Beta)
Other Info
Also run ...
Laptop - Quad 8GB - Windows 10 Pro x64
Nexus 7 Android tablet x2
Samsung 10.2" tablet
Blackview TAB 8 4G Android Tablet c/w Keyboard
Wacom Intuos Pro Medium Pen Pad
Wacom Intuos Pro Small Pen Pad
Wacom Expresskeys Remote
Loopdeck+ Graphics Controller
Shuttle Pro v2 Control
Computer type
Laptop
System Manufacturer/Model Number
Dell XPS 17 10750H
OS
Windows 11 Pro x64 Latest RP
CPU
Intel I7 10750H 5.0GHz
Motherboard
Dell XPS
Memory
32GB [2x16GB] DDR4 2933 MHz
Graphics Card(s)
nVidia GTX1650Ti 4 GB GDDR6
Sound Card
Stock [Realtek] 4 Speaker
Monitor(s) Displays
17" IPS UHD+ Infinity Edge Touchscreen
Screen Resolution
3840 x 2400
Hard Drives
2TB M2 NVMe, 4TB External + various 500GB & 1TB External NVMe (also have access to spinner HDD from
PSU
Stock
Case
Stock XPS Aluminium & Carbon Fibre
Cooling
Stock - Active Fan Control
Keyboard
Backlit + Various Logitech
Mouse
Stock Track Pad + Logitech MX Trackball
Internet Speed
72 MB Down 18MB Up
Browser
Chrome
Other Info
Also run ...
Laptop - Quad 8GB - Windows 10 Pro x64
Nexus 7 Android tablet x2
10.2" tablet
Sony Z3 Android Smartphone
Wacom Intuos Pro Medium Pen Pad
Wacom Intuos Pro Small Pen Pad
Wacom Expresskeys Remote
Loopdeck+ Graphics Controller
Shuttle Pro v2 Control Pad
10TB NAS
I checked Lenovo don't supply drivers for Windows 7 for my laptop model. I found every driver except the touch pad driver. Once I find the correct touch pad driver I should be able to install Windows 7 no problem.
The touch pad drivers may be easier to find than most, as the major manufacturers tend to "buy-in" touch pads rather than design their own ...
The following is a Wiki entry that may provide a start point - Touchpad - Wikipedia
Synaptics are the big manufacturer's favourite but if all else fails you can get USB touch-pads that may work for you. there may be details in the device manager as to what is fitted
Trick is to save the registry before trying any test driver install and restore original before the next - this should keep cross contamination to a minimum, ( a system image is even more reliable of course)
Windows 11 Pro x64 [Latest Release and Release Preview]
CPU
Ryzen 9 5950X, 3.8 - 5.2 MHz
Motherboard
Asus Prime X570-Pro
Memory
64GB [2 x 32GB] DDR4 3200MHz
Graphics Card(s)
4GB NVIDIA GEFORCE GTX 1650 Ti
Sound Card
On-board SPDIF to 5.1 System + HDMI [5.1 system]
Monitor(s) Displays
32" UHD 32 Bit HDR Monitor + 43" UHD 4K 32Bit HDR TV
Screen Resolution
2 x 3840 x 2160 @60Hz
Hard Drives
1TB M2 SSD OS, 500GB Fast Access SSD, 2 x 8TB Data + Various Externals from 1TB to 4TB, 10TB NAS
PSU
NZXT C750 80 PLUS Gold 750W Modular PSU
Case
Workstation Case [Matt Black]
Cooling
NZXT Kraken X63 280mm CPU Cooler +2x Quiet Case fans
Keyboard
Logitech Wireless MX Keys & K400 + others
Mouse
Logitech Wireless MX Master 3S
Internet Speed
920 MB Down 50 MB Up
Antivirus
BitDefender Total Security Pro
Browser
Chrome (always run latest Non-Beta)
Other Info
Also run ...
Laptop - Quad 8GB - Windows 10 Pro x64
Nexus 7 Android tablet x2
Samsung 10.2" tablet
Blackview TAB 8 4G Android Tablet c/w Keyboard
Wacom Intuos Pro Medium Pen Pad
Wacom Intuos Pro Small Pen Pad
Wacom Expresskeys Remote
Loopdeck+ Graphics Controller
Shuttle Pro v2 Control
Computer type
Laptop
System Manufacturer/Model Number
Dell XPS 17 10750H
OS
Windows 11 Pro x64 Latest RP
CPU
Intel I7 10750H 5.0GHz
Motherboard
Dell XPS
Memory
32GB [2x16GB] DDR4 2933 MHz
Graphics Card(s)
nVidia GTX1650Ti 4 GB GDDR6
Sound Card
Stock [Realtek] 4 Speaker
Monitor(s) Displays
17" IPS UHD+ Infinity Edge Touchscreen
Screen Resolution
3840 x 2400
Hard Drives
2TB M2 NVMe, 4TB External + various 500GB & 1TB External NVMe (also have access to spinner HDD from
PSU
Stock
Case
Stock XPS Aluminium & Carbon Fibre
Cooling
Stock - Active Fan Control
Keyboard
Backlit + Various Logitech
Mouse
Stock Track Pad + Logitech MX Trackball
Internet Speed
72 MB Down 18MB Up
Browser
Chrome
Other Info
Also run ...
Laptop - Quad 8GB - Windows 10 Pro x64
Nexus 7 Android tablet x2
10.2" tablet
Sony Z3 Android Smartphone
Wacom Intuos Pro Medium Pen Pad
Wacom Intuos Pro Small Pen Pad
Wacom Expresskeys Remote
Loopdeck+ Graphics Controller
Shuttle Pro v2 Control Pad
10TB NAS
Used to be a default of 30 days, but MS reduced that to 10 days a year or so back. Their reasoning being that telemetry showed that users would either roll back in the first week or not at all. So they shortened it to 10 days in order to release the space windows.old occupied ASAP. The number of days can be changed if needed to anything in the range 2-60 days.
I also have W7 Pro on my System Two, and several W7 Hyper-V VMs. My other machines run Windows 10/11. Their specs are in my Ten Forums & Eleven Forum profiles.