How do I download stuff to my computor without the administer's password.I don't know the administer's password so I can't download anything?

Well, so you have lost Windows password? Is it a Windows 7/xp/vista or other OS?
There are some methods for your reference.
Firstly, I would like to know is it a Windows xp, window 7 or windows vista? Here are some options on Windows password reset.

Option 1: If it is a Windows xp, you can easily reset Windows password with a default admin password which is only stored in Windows xp.
Requirement:
Remember that, this method will only work if you already leave your admin password field blank when installing windows operating system.
Step 1: Just turn on your computer and wait for your login screen. If you see login window just hit Ctrl+Alt+Del keys in same time twice.
Step 2: Now type Administrator (letters are case sensitive) for Username field and leave password field blank and try to login to your computer as a system administrator.
If you can successfully login to your system, now you can easily reset your windows xp password.
Step 3: Just click Start > Control Panel > User Accounts and change or reset your password as you want.

Option 2: With the password hint to get back the lost Windows password again
Requirement: A password hint has created when set a windows password

Option 3: If you have another available admin password, you can also quickly recover forgotten Windows password successfully.

Option 4: Use a Windows password recovery tool to reset Windows password. As I know, there are kinds of good enough software to crack password efficiently, like Windows Password Unlocker passwordunlocker.com/windows-password-recovery.html , which I had used before, you can reset lost Windows password with it easily and efficiently.