Windows 10 Installation- old windows data in secondary drive

Riz said:

The process is stuck "on file 175138 46%" from last one hour.

Is there any disk I/O activity? Light blinking? Activity in Task Manager?

I just saw the pic you added. It says it found 175138 files, not on file #175138. Also says stage 1 of 3, estimated 2 hours more. A deep scan can take quite a while.

Riz said:

Here is task manager and D rive Disk I/O screen shots.

Find Recuva in the Details display of Taskmanager and see if there is disk activity. Read/Write/other. Are those numbers changing? Which ones? I don't want to kill the process if it's actually doing something.

Isn't Disk D showing 100% activity?

Guess only thing to do is kill the process. Whatever caused the initial issue of your data being overwritten may have corrupted something. Could try chkdsk D: /F from Admin command prompt to see if there any bad blocks.

The reason I asked for the details of task manager (not performance screens) was to see if there was lots of internal I/O in the column labeled "other I/O".