Admin Password Not Beign Recognised When Installing Apps

I'm trying to install an emulator. Whatever I type in, main account password or admin account isn't recognised, but I can log into the admin account with no issues. I never had this problem until today. Nothing was changed.

Update: I clicked to run it as administrator and it works.

When an app needs admin rights, Windows shows a special UAC (User Account Control) prompt. Most programs trigger that prompt correctly, but some older or oddly‑built installers don’t. When that happens, Windows ends up asking for your password in a slightly different “desktop mode,” and the prompt can fail even though the password is right.

By choosing Run as administrator, you forced Windows to use the standard elevation method — the one that works — and the install went through without any trouble.

So nothing is wrong with your password or your account. The installer just wasn’t triggering the admin prompt properly, and Windows refused the elevation as a safety measure.