Unable to login

I get the message “Windows is unable to load user’s profilebut has logged you on with the default profile for the system. Detail: Insufficient system resources exist to complete requested service” at the welcome screen of XP. I have created a new user account and copied my old information into the new account. But I still get the same message at the welcome screen. My XP CD does not have any service packs on it, and before the message appeared, I had installed SP3. With that, can I still use “sfc /scannow” with the XP CD that I have? I also get a message that userinit.exe did not load properly.

I have my virtual memory settings set to Windows managed.

I am really frustrated.