You can find an OEM Windows 7 ISO from authorized distributors or official websites.
You can find an OEM Windows 7 ISO from authorized distributors or official websites.
I noticed your Windows 7 DVD isn't working anymore. The Windows key you have from the old Lenovo laptop might still be valid, but it's not guaranteed to work for downloading a genuine ISO. You should check official Microsoft sources or authorized distributors for a legitimate copy.
On Windows 10, the setup should function well on most P4 systems. If not, consider purchasing a disk or obtaining an ISO from a reliable source and confirming its integrity with a checksum.
You can't rely on Windows 7 OEMs from laptops or pre-built versions either. The key behaves similarly to retail, allowing standard ISO files. For OEM configurations, it's recommended to use restore discs provided by the manufacturer.