cargo build-bpf command not working for solana

Question

I'm getting this error after I execute the command cargo build-bpf to build the program for Solana on Windows 10.

info: uninstalling toolchain 'bpf'
info: toolchain 'bpf' uninstalled 
error: no such command: `+bpf`

        Cargo does not handle `+toolchain` directives.
        Did you mean to invoke `cargo` through `rustup` instead?`