Keyboard input lag can be caused by software conflicts, power issues (for wireless keyboards), or outdated drivers. First, if you’re using a wireless keyboard, ensure that the batteries are fully charged or replace them if they're old. Weak battery power can lead to delayed inputs. If the lag occurs on a wired keyboard, disconnect and reconnect it to see if that resolves the issue. Software conflicts can also cause input lag, so check for updates for your operating system and applications, as they often contain performance optimizations. Running a scan for malware is recommended since malicious software can affect system response times. Opening the Task Manager to close resource-heavy applications may also help. Additionally, outdated keyboard drivers can contribute to lag, so updating these through Device Manager is a good troubleshooting step. Testing another keyboard on the same computer can help confirm if it’s an issue with the device or system settings.