Google the following: XP TAKE OWNERSHIP
It will tell you what you have to do to take ownership of the folders/files you want to copy. An even easier solution would be to copy them from your backup. Don't you have a backup?
I cannot log in to XP Home Edition SP3 on my main user account, which has Administrator access. It hangs on 'Loading Personal Settings'. There seems to a lot of processing activity as the fan speed increases. Other accounts open OK.
I set up a new Admin level user account and I expected to be able to copy my files over to it after logging in as Admin using Safe Mode, but although I can see the 'problem user' directory, I get the message that the directory 'Is not accessible. Access is denied'. I don't have the 'turn off Simple File Sharing' option as it's not XP Pro, and I cannot change the sharing permissions of the directory.
I have also tried starting in Diagnostic Mode, even though I didn't expect that would help as other Windows accounts are OK. There are no previous restore points.
So, although I can access the PC, I can't get to my files.