Hi, I'm John! I will help you with this.
Microsoft usually releases security updates on Patch Tuesday, which is the second Tuesday of each month. If Windows Update says “You’re up to date,” it normally means there are no new updates currently being offered to your device.
Are you getting a message saying: “Your device is missing important security updates”?
Could you provide me with a screenshot of your current Windows OS Build?
To do this, press the Windows key + R to open the Run dialog, type winver and press Enter, capture a screenshot (make sure not to include your email address), and attach the screenshot in your next response.