I upgraded a family member’s Windows 7 to Windows 10, so I’ll share the process.

Prerequisites

PC, OS, CPU, Memory and Other Specs

• PC: Lenovo G550 2958GCJ
• OS: Windows 7 Home Premium
• CPU: Celeron Dual-Core CPU T3100 1.90GHz
• Memory: 2.00 GB

Preparation

To back up important files, I registered for the following services and installed tools:

• Gmail - Google の無料ストレージとメール
• MEGA

Free Upgrade from Windows 7 to Windows 10

I worked referencing まだ可能！Windows 10 への無償アップグレード方法【2019年版】 – Hacker’s High.

Mobile Intel(R) 4 Series Express Chipset Family

It showed that it wouldn’t work with Windows 10, but there were no problems after upgrading to Windows 10.

Uninstall Microsoft Security Essentials

I clicked Control Panel in the Start menu and uninstalled Microsoft Security Essentials from Programs and Features.

What to Do After Upgrading to Windows 10

Windows Defender

Referencing Windows セキュリティによる保護 - Windows Help, I updated Windows Defender to the latest version.

Extra: Memory Upgrade from 2GB → 8GB

Referencing Lenovo G550 2958FBJを8GBに増設 - PC, I upgraded the memory from 2GB to 8GB.

Amazon | Team ノートPC用メモリ SO-DIMM-DDR3 永久保証 ECOパッケージ (1333Mhz PC3-10600 1.5V 4GBx2) | Team | メモリ 通販

That’s all from the Gemba.