With the help of the vista local security policy setting, the administrator account in windows vista can be revealed.

To enable the Windows vista administrator account do the following steps.

1. Click on Vista Start button, then go to Control Panel.
2. Inside Control Panel, click on System and Maintenance link, follow
   by Administrator Tools at the bottom.
3. An Administrator Tools window appears. From there, click on Local Security
   Policy applet.
4. Alternatively, type secpol.msc in Start Search box and press Enter.
5. Click Continue on User Account Control’s Windows needs your permission
   to continue running Microsoft Management Console (MMC) dialog box.
6. On the left pane of Local Security Policy MMC, expand Security Settings
   (should be opened by default), then expand Local Policies.
7. Click on Security Options branch.
8. Double click on Accounts: Administrator account status setting,
   then select Enabled radio button on Local Security Setting tab
   of Properties window.
9. Click on OK button.
10. Log off, switch user of restart your computer to logon with activated Administrator
    account.