Migrate your entire Windows installation to a faster SSD without reinstalling — zero data loss.
Use Macrium Reflect Free or Clonezilla. Install and open it with your new SSD connected via USB adapter. Do not initialise the new drive in Disk Management — let the cloning tool handle it.
In Macrium: 'Clone this disk'. Select your current Windows drive (usually Disk 0). Ensure you see the EFI, MSR, and Windows partitions listed.
Choose your new SSD as the destination. Drag all partitions across. If the SSD is larger, drag the Windows partition edge to fill the space.
Click Finish → OK → Continue. The process takes 20–60 minutes depending on data volume. Do not use the PC during this time.
Power off. Remove the old drive and physically install the new SSD in its place. For laptops: use the main 2.5" bay or M.2 slot as appropriate.
Power on. Windows should boot normally from the new SSD. Open Disk Management to confirm the correct drive is active. Speeds in Task Manager → Performance should be noticeably higher.