Hàm IF cho phép bạn tạo so sánh lô-gic giữa một giá trị và một giá trị dự kiến bằng cách kiểm tra điều kiện, rồi trả về kết quả nếu True hay False. =IF (Điều gì đó là True, thì làm gì, nếu không thì làm gì khác) Vì vậy, một câu lệnh IF có thể có hai kết quả. Kết ...

Important: Microsoft accounts, the Windows operating system, and other Microsoft products include passwords to help secure your information.This article provides some options that you can use to reset or recover your password if you forget it. Be aware that, if these options don’t work, Microsoft support can't help you retrieve or circumvent a lost or forgotten password.

On your taskbar, select the Network, Volume, Battery icon > VPN. From the list of VPN connection names, select the one you want, and then select Connect. If prompted, enter your username and password or other sign in info. Connect to a VPN from the Windows Settings page: Select Start > Settings > Network & internet > VPN .

Tap Settings > Notification Settings and make sure Show notifications is turned on. Make sure your device is up to date, and that any other security apps (such as Microsoft Defender and Intune Company Portal) are also up to date. Make sure the device's Date & time are correct too. If you're using VPN, try disconnecting to see if the issue persists.

Create a presentation. Open PowerPoint. In the left pane, select New. Select an option: To create a presentation from scratch, select Blank Presentation. To use a prepared design, select one of the templates. To see tips for using PowerPoint, select Take a Tour, and then select Create, . Add a slide.

Add a device to a Windows 10 PC. Windows 10. Windows 10 usually finds devices automatically when you plug them in or turn them on. If it doesn't, follow these steps: Select Start > Settings > Devices > Bluetooth & other devices. Select Add Bluetooth or other device and follow the instructions. Add a device.

In Microsoft 365, you can print and preview files from the same location by clicking File and then Print (or pressing CTRL+P). To see what your print job will look like before you send it to the printer, go to File > Print. Tip: You can add the Print Preview or Print buttons to the Quick Access Toolbar in order to access them more quickly.

Right-click on the desktop you want to change. Select Choose background. Select the list in the Personalize your background section, then select Picture. Select a picture. Use multiple desktops in Windows to organize projects, or quickly switch between desktops before a meeting.

To check for any security issues, go to Windows Defender settings, select Show details, and check your security status.

You also get 5 GB of free cloud storage for your email attachments, files and photos in OneDrive. Storage quotas: You can check your storage usage and quotas by checking the Microsoft storage area of your account dashboard. Open account dashboard. Tip: To increase your mailbox size and cloud storage quota, you can buy a Microsoft 365 subscription .