I added another admin account, called admin, but my origional account named home has disappeared, and now all my computer sett

Try CTRL+ALT+DEL pressed twice simultaneously as you get to the Logon Screen, that should make the previous account appear so you can click it and logon. If you have autologon setup, as you enter to the desktop, Log Off and press CTRL+ALT+DEL twice simultaneously... this should work and if not, there's a way to make the new user use the old user's folder.

Just to clear up the previous instructions: The ctrl+alt+del pressed twice should be done at the logon screen and provided you have normal logon set up and not autologon...

You can also set the classical Windows logon box to have the possibility to type in the "lost" user name. To do this, press the Windows Key and the R key simultaneously.. On the Run box that appears on the screen, type: "control userpasswords2" (no quotes) and press Enter... continue in the answers.microsoft thread following the first reply (with bold letters). When you're done, Log Off and you should see the Classical Windows logon box where you can type in the lost user account name.. If you don't see the box, restart the computer and try loging on to the lost user account. If you can't logon, logon again with the account you're using now and see if the lost account still exists as follows:

Go to Control Panel \ System \ Advanced System Configuration (left side)\ Advanced Options tab \ User Profiles \ Configuration \ You should see the lost user account... it means it's not lost but it's been corrupted... I'll later try to explain the recovery or use of the corrupted user account profile folder on a new user account.

http://answers.microsoft.com/en-us/windows/forum/windows_7-security/how-do-i-change-the-way-users-log-on-or-off-with/40d4ca32-5b29-497d-ac12-c9c04029bdda

EDIT: Maybe you shouldn't set the Classic Windows Logon Box!!... I tried it on my Windows 7 and nothing happened after pressing ctrl+alt+del so it didn't allow me to logon. I used the same setting that never caused a problem in Widows XP, and it should have also worked for Windows 7... it's in the Microsoft Answers forum and all over the internet, so I trusted it... but it didn't work on my system, it may be my Win 7 only and it probably won't happen in your's, but if it does, Safe Mode allows logon so you can revert the setting.

To logon in Safe Mode, right after the BIOS post, press the F8 key each second untill the Safe Mode options screen appear on the monitor, select Safe Mode and press Enter. To undo the setting: Press the Windows and R keys simultaneously and type "control userpasswords2" and press Enter... Click on the Advanced Options tab, and remove the check mark from the box on the bottom.

I applied the method in the second answer (secpol.msc) to enable ctrl+alt+del and that worked perfectly.

http://answers.microsoft.com/en-us/windows/forum/windows_7-security/how-do-i-change-the-way-users-log-on-or-off-with/40d4ca32-5b29-497d-ac12-c9c04029bdda

This may be a bit complicated so read it several times before you start applying them... It's best that you first try to repair the corrupted user account profile following method1. I know of two more mtehods but for now try with method1, and later on method2 if necessary. meethod 3 would be the last resort and simple but tedious way to do it.

If I understand correctly your old user account was named Home? and the account you're using now is Admin?.

METHOD #1 consists on using the ntuser.backup file in the user "Home" folder to replace the ntuser.dat file... this is like performing a System Restore on the user account/profile only. Apply this method from Admin. So, browse to C:\Documents and Setting\Home and locate all the files named "ntuser" all should be within the folder named "Home".. the file that stores all the user Home registry data is named ntuser.dat this is the file that gets corrupted and prevents the use of the user account. So, you start by:

1.- unhide hidden files and protected operative system files in Explorer\Tools\folder options\view; mark "Show hidden files and folders", next remove the check mark from "Hide protected opertive system files (recommended)"..

2.- Locate all the files named "ntuser" in the user Home profile folder... the file names may be; ntuser.dat ntuser.backup, ntuser.log etc. So, you start by renaming ntuser.dat (which is corrupted) to ntuser.old and move it to a new folder you can create under Documents and Setting and name it "ntuser save"... (Documents and Settings\ntuser save)... keep in mind you should make a note of the dates of all ntuser files so you'll have an idea of which ntuser.backup to use to replace ntuser.dat with, as there may be more than one "ntuser.backup".
Files in the Documents folder shouldn't be affected but it would be best that you move them to a safe folder to be sure
If the system security doesn't allow you to copy, rename or move files, you'll have to take ownership according to the link below.

3.- After identifying the ntuser.bakup you'll use to restore the profile, save a copy of it in the folder named ntuser save, next rename ntuser.backup (in Home folder) to ntuser.dat, next restart the computer and try to logon with the "Home" user account.. you may have to press ctrl+alt+del to bring to view the bar to type Home.. after typing Home, you may have to wait for the system to perform the registry repairs as it may take a while. If you manage to logon with the repaired Home user, that's all.. all that may remain is changing user settings if necessary as the account will go back to the date the ntuser.backup had. .

Take Ownership of a File or Folder
http://technet.microsoft.com/en-us/library/cc753659.aspx

This may be a bit complicated so read it several times before you start applying them... It's best that you first try to repair the corrupted user account profile following method1. I know of two more mtehods but for now try with method1, and later on method2 if necessary. meethod 3 would be the last resort and simple but tedious way to do it.

If I understand correctly your old user account was named Home? and the account you're using now is Admin?.

METHOD #1 consists on using the ntuser.backup file in the user "Home" folder to replace the ntuser.dat file... this is like performing a System Restore on the user account/profile only. Apply this method from Admin. So, browse to C:\Documents and Setting\Home and locate all the files named "ntuser" all should be within the folder named "Home".. the file that stores all the user Home registry data is named ntuser.dat this is the file that gets corrupted and prevents the use of the user account. So, you start by:

1.- unhide hidden files and protected operative system files in Explorer\Tools\folder options\view; mark "Show hidden files and folders", next remove the check mark from "Hide protected opertive system files (recommended)"..

2.- Locate all the files named "ntuser" in the user Home profile folder... the file names may be; ntuser.dat ntuser.backup, ntuser.log etc. So, you start by renaming ntuser.dat (which is corrupted) to ntuser.old and move it to a new folder you can create under Documents and Setting and name it "ntuser save"... (Documents and Settings\ntuser save)... keep in mind you should make a note of the dates of all ntuser files so you'll have an idea of which ntuser.backup to use to replace ntuser.dat with, as there may be more than one "ntuser.backup".
Files in the Documents folder shouldn't be affected but it would be best that you move them to a safe folder to be sure
If the system security doesn't allow you to copy, rename or move files, you'll have to take ownership according to the link below.

3.- After identifying the ntuser.bakup you'll use to restore the profile, save a copy of it in the folder named ntuser save, next rename ntuser.backup (in Home folder) to ntuser.dat, next restart the computer and try to logon with the "Home" user account.. you may have to press ctrl+alt+del to bring to view the bar to type Home.. after typing Home, you may have to wait for the system to perform the registry repairs as it may take a while. If you manage to logon with the repaired Home user, that's all.. all that may remain is changing user settings if necessary as the account will go back to the date the ntuser.backup had. .

Take Ownership of a File or Folder
http://technet.microsoft.com/en-us/library/cc753659.aspx