you're just writing a path into command line.
I guess you want to navigate to specific folder. In that case you should use command CD
(Change Directory) like this:
cd \
(used to navigate to root of your c: drive)
cd "Program Files"
(navigate into "Program Files" folder)
cd Oracle
(go into Oracle folder)
etc...
Alternatively, you can write all that in single CD
command
cd "\Program Files\Oracle\VirtualBox"
To summarize: You're making a mistake by not using any command (hence the error (...)is not Recognized as Internal or External). CD
is command, "c:\Program Files"
is path, a parameter for CD command.