Is it possible that my guest account turn to administrator?

SOURCE: Administrator Password Problem

it has a hardware solution..u need to do is open ur cabinet....den reset jumper setting(ask bout it to any hardware guy] otherwise...just remove CMOS battery for 5 mins [this battery is in silver color & ofcorse round in shape can easily see on motherboard...& den refix it....admin password will erased.

SOURCE: No Icons show up

When you have your desktop up & displayed, click the right mouse button & it will bring up a menu. Hover your mouse above the "Arrange Icons By" option and it will bring up a sub menu. If the "Show Desktop Icons" option does not have a check mark to the left of it, that is your problem. If there is no check mark, navigate down to it and click on it with your left mouse button and that will make your icons display.

SOURCE: My Administrator account password changed when my

Order and recovery disk and reinstall the OS. You will loose your files. To avoid this you can buy a usb hardrive connector for about 25 bucks to access your existing files on another computer prior to the reinstall.

SOURCE: Setting myself as administrator

- If you are using the Administrator account or your account has Administrator privileges but you are getting a prompt that "you do not have administrative rights", try to adjust the "User Account Control Settings" to medium or low.
-Click Start
-On the Search box type UAC and press Enter.

- Lower the settings for UAC by sliding the bar down.

~~ Hope this helps~~

SOURCE: I cant reset my password on my main administrator

A couple weeks ago, I forgot my Windows account passwords. At last, my workmate David recommend Windows Password Reset 9.0. This useful tool successfully assist me access to Windows. You just go to their website: http://www.reset-windows-password.com