Method 1:
1. Press F8 to enter "Safe mode" when powering on--select "Safe Mode with network connection";
2. Select the "Adminstor" Administrator account (which does not require a password);
3. In the control Panel to find the user account, to cancel the password on it;
4. Then restart, login, there is no password
Supplement: Method 2:
Are you talking about the Windows password???
What system,????
2000 easy, XP a little more complex
2000 Setting the password for your default login in the Control Panel-> Management tool-> Computer Management
And then to the Control Panel-> users will use the local user must enter the password to remove the hook
XP is more complicated
Step 1th: Run Registry Editor, expand the [HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows Ntcurrentversionwinlogon] branch in turn, and then double-click on the right window DefaultUserName ", then enter your login username. If you do not have a preset user name, you can add this item by clicking edit → new → string value (s) →defaultusername in the menu bar of the Registry Editor, noting that you want to differentiate between uppercase and lowercase letters.
Step 2nd: Also under this branch, double-click "DefaultPassword" in the right window of the Registry Editor, and then enter your password in the blank column. If you do not see the "DefaultPassword" item, follow the steps above to create a new string value.
3rd step: Next in the right window, double-click "AutoAdminLogon" to set the value to "1". If you do not find "AutoAdminLogon", you can follow the steps above to create a new.
Now close the Registry Editor and restart your computer, and you'll find that the annoying logon dialog box is gone.