How to make a window task run everytime I enter my password/unlock the computer?

You can set triggers for tasks, as opposed to running on a schedule.

• Start Task Scheduler from the start Menu
• Select the Task Scheduler Library in the left nav pane
• Select Action > Create Task... (not Create Basic Task...) from the menu bar
• In the new Create Task window, select the Triggers tab
• Click on the New... button
• In the "Begin the task:" drop down, select "At log on" or "On workstation unlock"
• Repeat and create a second trigger for the task that covers the one you didn't select before
• configure the rest of the task normally