Run the app as an administrator
Some apps require administrator privileges to work correctly. You can run WhatsApp as an administrator by right-clicking on the app and selecting Run as administrator.
If running the app as an administrator solves the problem, you will have to do this every time you want to run WhatsApp on your computer.
It can be a little tricky, but you can set WhatsApp to automatically launch as an administrator.
To do this, follow the steps below:
Right-click the WhatsApp shortcut on your desktop and select Properties.
Click the Compatibility tab and make sure that the option Run this program as an administrator is checked.
Click Apply and OK to save your changes.
After that, you can run WhatsApp as usual and it will always run as an administrator.
Disable your antivirus program
Oftentimes your antivirus tool can interfere with the installation process and cause WhatsApp to crash. If this happens, you should temporarily disable your antivirus utility and try to install the app again.
Reinstalling the app
Some users have reported that WhatsApp does not work correctly on Windows 10 PCs. If you encounter the same problem, you should consider reinstalling the app.
After reinstalling WhatsApp, check to see if the problem remains.
Some users also recommend deleting all data related to WhatsApp when reinstalling to avoid possible conflicts, which you can do.
Check whether WhatsApp is allowed to run in the background.
Users report not receiving WhatsApp notifications on their phones or not receiving messages. This can be a big problem, as you can’t receive calls or messages if WhatsApp isn’t enabled on your phone.
Users suspect that this problem is caused by battery charging mode, and to solve it, you need to open battery charging mode and check if WhatsApp is enabled in the background apps section.
If WhatsApp is not available, make sure it is turned on. To do this, follow the steps below:
Go to Settings -> System -> Battery Saving.
Tap Change battery saver settings.
A list of all apps will appear. Find WhatsApp in the list and make sure the option is enabled.
Once WhatsApp is running in the background, you will be able to receive SMS, calls, and other notifications without any problems.
Can't connect to WhatsApp Web or Desktop
Problems with your phone, computer, or Wi-Fi connection are some of the common reasons why you might not be able to send or receive messages on WhatsApp Web or Desktop.
Phone connection problems
If you’re unable to send or receive messages on WhatsApp from your phone, then you won’t be able to use WhatsApp Web or Desktop on your computer. Open WhatsApp on your phone and try to send a message. If you can't, learn more about how you can troubleshoot your phone connection: Android | iPhone
If you’re able to send a WhatsApp message from your phone, try using WhatsApp Web or Desktop on your computer again. If you still have issues sending or receiving messages, you may have a connection issue with your computer.
Computer connection problems
You must have a strong and stable Internet connection on your computer to use WhatsApp Web or Desktop. If you see a yellow banner above your chats list with the error message "Computer not connected", check to make sure your computer's Internet connection is active. If your computer's Internet connection is working normally and you still can't send or receive messages, refresh the page if you’re on WhatsApp Web or quit and restart the program if you’re using WhatsApp Desktop.
For WhatsApp Web, you must use the latest version of Chrome, Firefox, Microsoft Edge, Opera, or Safari. Other browsers such as Internet Explorer aren’t supported.
Wi-Fi connection problems
If you’re using a managed Wi-Fi network, such as at an office, library or university campus, your network might be set up to block or limit connections to WhatsApp Web. If WhatsApp Web notifies you that you're on a Wi-Fi network that’s preventing WhatsApp Web from operating correctly, please make sure your network is set up to bypass traffic to "web.whatsapp.com", ".web.whatsapp.com", or ".whatsapp.net".