উইন্ডোজ অপারেটিং সিস্টেমে Ctrl+Alt+Del ব্যবহার হয় -

The combination of keys Ctrl + Alt + Del is used in the Windows operating system to access the Task Manager, which is a tool that displays information about the processes running on a computer and allows you to end processes, manage applications, and perform other system-related tasks.

The Ctrl + Alt + Del combination is also used to log out of the current user account, switch to a different user account, or lock the computer.

The use of Ctrl + Alt + Del was introduced as a security measure to prevent malicious software from intercepting user passwords and other sensitive information. By requiring users to press the combination of keys, the operating system could be sure that the user was intentionally trying to access the Task Manager or perform another system-related task, rather than being prompted by malware.

In summary, the Ctrl + Alt + Del combination is used in Windows operating systems as a security measure to access the Task Manager, log out of the current user account, switch to a different user account, or lock the computer.