After Upgrading a Laptop's OS from Windows Vista to Windows

Multiple Choice

After upgrading a laptop's OS from Windows Vista to Windows 10, hard drive activity is elevated when running normal user applications, causing the laptop to run slowly. Which of the following should a technician do FIRST?

A) Flash the laptop BIOS to the most current version available from the manufacturer.
B) Replace both of the installed 1GB SoDIMMs with compatible 4GB SoDIMMs.
C) Attach an external USB hard drive and move all user data off the internal drive.
D) Upgrade the currently installed 500GB SSD with a 1TB SSD.