Final answer:
The best initial response when a user cannot login to their computer is to ask about recent changes since their last successful login, before proceeding with other troubleshooting steps like checking caps lock or network devices, and considering a restart.
Step-by-step explanation:
If a user cannot login to their computer, the best response is to first ask the user, "When was the last time you were able to login? What has changed since then?" This process helps in understanding any recent changes that could affect the login process. While checking if the caps lock is enabled or the network device they're connected to can be part of troubleshooting, asking about recent changes can provide immediate context that could lead to a quicker resolution. Restarting the computer is a common troubleshooting step that addresses a range of issues, including login problems, but should be considered after initial inquiries and checks.
Checking the network device they're connected to can also be a helpful troubleshooting step to ensure there are no network connectivity issues.
Restarting the computer is another potential solution, as it can sometimes resolve weird login issues.