Basement windows are a neglected security consideration in most homes. Flimsy, and barely locked, an easy intrusion point.
We installed a series of bars on the basement windows, that not only restrict access, but are a visual deterrent. Inexpensive yet very effective.
The picture of the front door shows the existing lower lock, plus the new keypad deadbolt we installed above. We must install three to four of these a week. People love the control of taking codes in and out themselves, and not having to worry about keys for everyone.
These Schlage BE365 keypad deadbolts also come in a door knob version.