If the file doesn’t exist in the above location, run OneDriveSetup.exe located at the Windows\SysWOW64 or Windows\System32 directory. This setup package may not be the latest one, but it downloads the current version installer from Microsoft’s servers on demand, and runs it.
If at any time later you want to use OneDrive again, you can install it from Command Prompt. Here’s how:
Press the Windows + X key combinations to open the Quick Access menu. Select Command Prompt (Admin).
To install the OneDrive in Windows 10 64-bit, issue the following commands:
If you’re running the 32-bit version of Windows 10, type this command instead:
Upon completing the installation, restart the computer and you can then use OneDrive again.
Windows x64 has a directory System32 that contains 64-bit DLLs (sic!). Thus native processes with a bitness of 64 find "their" DLLs where they expect them: in the System32 folder. A second directory, SysWOW64, contains the 32-bit DLLs. The file system redirector does the magic of hiding the real System32 directory for 32-bit processes and showing SysWOW64 under the name of System32.
I uninstall it manually from add/remove program accidently and I want to install it back.