SafeSearch lets you filter sexually explicit web sites and images from your search results. You can lock your setting to the strict level of filtering using a password.
To use SafeSearch lock, go to the “Search Settings” page on Google.
You may find when using some editions of Windows Vista that your password expires and you are required to change it. This problem will keep re-occurring until you change your account profile to prevent password expiration.
To do this, start lusrmgr.msc from the run box (Press WINDOWS KEY + R to access this):
Once the Local User Manager has loaded, click Users in the left column and then double click your username in the main window:
Now, tick the Password Never Expires box followed by OK:
In future, you password will not expire. Allowing you to log on without needed to change your password again.