I have the Dell Inspiron 1012 mini, and forgot my password. how can i reset it if I can only connect USB drive.

You can follow this: How to Reset Dell Laptop Password?

To reset a forgotten Windows password on Dell Inspiron, there are several free methods:
1. With another admin account.
2. With Windows password reset disk.
3. From Safe Mode.
4. With CMD.
5. Using "lusrmgr.msc"
Best solution: Reset forgotten Windows password on Dell Inspiron with Windows Password Recovery Tool 3.0.
1. Install this program on another computer and create a password recovery disk with USB
2. Insert the disk to your laptop and set your laptop to boot from it.
3. All user accounts will be loaded, then you can reset any user password.
For more: How to Hack a Dell Laptop Password?

Enter 3 time wrong code u will see a 5 digit code send me that one ill send u master password

Way 1. Use Previously-created Dell password reset disk
Step 1: Sign in Windows with a wrong password, and then click OK to close the error message.
Step 2: Click the Reset Password link to open the Password Reset Wizard.
Step 3: Insert the previously-created password reset disk in computer, and click Next.
Step 4: Select the inserted password reset disk and click Next.
Step 5: Type a new Windows password and password hint, and then click Next.
Step 6: Click Finish button when Dell password reset is done.


Way 2. Use another Windows administrator account
Step 1: Sign in Windows via another administrator account.
Step 2: Type "user accounts" in the search box and select User Accounts in the search results.
Step 3: User Accounts windows will open, with All Windows user accounts displayed.
Step 4: Select the user account that you want to reset password of.
Step 5: Type a new password twice, a password hint once, and then click Change password button.


Way 3. Use Windows Password Key
Step 1: Download and install Windows Password Key in any PC that you can run as admin.
Step 2: Create a boot Windows password reset CD/DVD or USB drive in seconds.
Step 3: Boot the target Windows PC from the burned boot password reset disk.
Step 4: Reset the forgotten Windows user password within 3 clicks.
Step 5: Sign in Windows without password on its logon screen.


More detail guide: How to Reset Dell Password?