A drive letter
When you get a message that says, 'Windows cannot access the specified device path file,' this means that an error has occurred which has corrupted the file and made it inaccessible.
Paging file is located in the root folder of the system drive.
C:\windows\winn.sif
regscan.exe is located in the folder C:\Windows\System32. The file is not a Windows system file. regscan.exe is an unknown file in the Windows folder. The program is not visible. The process starts when Windows starts (see Registry key: HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run).
A file path is a notation that indicates a file's location on your computer. The file path leads you through the windows files system to your file.
The Windows path separator is the backslash character (\). It is used to separate directories in file paths on Windows operating systems. For example, a typical file path might look like C:\Users\Username\Documents\File.txt. In contrast, Unix-based systems use the forward slash (/) as the path separator.
The series of locations separated by small triangles or backslashes that describes a file's location in the file hierarchy is called a "file path." A file path illustrates the route to access a particular file or directory within a file system. It typically starts from a root directory and includes all parent directories leading to the specific file or folder. For example, in a Windows system, a file path might look like C:\Users\Username\Documents\File.txt.
To see a files path in Windows 7/8/10 open your File Explore. From there locate the file you want to inspect and right click it. Select the word "Properties" and in the top of the properties details will be the file path.
The drive letter followed by colon backslash dir backslash C:\windows\dir
C:\pagefile.dat
C:\Documents and Setting \username\Ntuser.dat
The path to the registry directory starts with windows /system32/ config All depends what type of windows you have on your computer. Best is to check the information you got delivered with your computer.