I have a Windows XP computer that I only use for Photoshop. After not using it for a while, I booted it up, but found that I couldn't log on: the welcome screen displayed the Windows XP logo on the left, but no usernames on the right. Ctrl + alt + delete prompted me to enter a name and password to logon, but I wasn't able to get onto my account (I tried all of the password combinations that I could think of). Booting in safe mode gave the same result.
This computer hasn't been connected to the internet for at least a year, and I can't recall running any programs other than Photoshop on it recently. It was at one point networked to this computer, which is (obviously) connected to the internet, but it hasn't been for a while.
I tried looking around for this topic, but I couldn't find any resolved problems that were similar to this one. :/
Thanks for taking the time to look into this.