The reason why would Microsoft Edge open multiple tabs upon launching:
- Run a Malware Scan on Your Computer-Because of a virus, spyware, or adware, Microsoft Edge may open several windows. To get rid of this type of danger, it is always a good idea to run a comprehensive scan on your computer.
- Clear Your Browsing History-Click the 3-dot icon and select Settings from the drop-down menu after starting Microsoft Edge. In the Clear browsing data section, click Choose what to clear. Check all of the items in the list and then click the Clear button.
- Reset Your Internet Explorer-You can also reset your browser to resolve the issue with Microsoft Edge opening numerous windows.
- Your Computer Should Be Rebooted-If your Microsoft Edge launches with numerous tabs open, it's possible that some third-party software or service is interfering. You can clean boot your computer in this situation to identify the faulty program or service. To open System Configuration, type MSConfig in the Run window and click OK. Go to the Services tab, select Hide all Microsoft services, and then click Disable all. Click the Open Task Manager button on the Startup tab. After that, disable all of the programs listed and return to the System Configuration window to save your changes.