cannot sign in

system boots up, but when is gets to the sign in screen it just turns to a blue screen.
I can move the cursor but that's it.
all I can do is hold down the on button and shut of the system.

What Mac is this and which version of OSX. Is it really 10.0 or a newer version?

This has been answered several times already, but I will post this link again:

http://docs.info.apple.com/article.html?artnum=106464#symp1

D3v1L80Y said:

This has been answered several times already, but I will post this link again:

http://docs.info.apple.com/article.html?artnum=106464#symp1

Click to expand...

Thank you for the help
I did try a search but had no luck
Thanks again

the information you supplied fixed my issue
Grazie