Host 'localhost' is not allowed to connect to this MySQL server

[bluemonster]

Installation to mysql-5.0.37-win32.zip failed at Apply security settings

Error I get
The security settings could not be applied.
Error Number 1130.
Host 'localhost' is not allowed to connect to this MySQL server

can anyone help me how to solve this problem. Where can i download older version of mysql 5.0

[bluemonster]

is it by default mysql 5.0 must install in C:\Program Files\MySQL\MySQL Server 5.0?

when i install to D:\MySQL\MySQL Server 5.0, the installation failed at level 4 security

but when i remove and reinstall to C:\Program Files\MySQL\MySQL Server 5.0, the installation work.