This behavior is not indicative of a malware infection, more likely this is caused by an incomplete Windows installation.
Open File Explorer, then go to C:\Users.
In there, do you find more than one user folder that looks like your user folder, and if so, do you find your files in any user folder in there.
Also, you indicate you recently wiped your laptop, do you have a safe copy of your files somewhere or use OneDrive to sync your files online.