Changing User Account Type - User to Guest - File Deleted

Hi Guys,

One of our staff PC has a problem, the scenarios:

Specs: (Alias Names)

• Windows 7 Pro, 32 Bit, 2 GB RAM
• Company Name: Contoso
• Staff PC under Domain Alpha
• PC Name: Contoso1-PC
• Local Users are: administrators and john
• User profiles:
  
  
  • operations (contoso domain)
  • john (local)
  • administrator (local)
• MS Outlook connected to operations@contoso.com

Thursday:
IT

1. remove/uninstall chat messengers, blocked linkedin,facebook,twitter,youtube
2. change User Account Type (Local Staff John Doe) from User to Guest
3. shutdown the system

Friday

1. turn on the PC and staff asks for the correct username
2. provides the username, Contoso1-PC\john
3. staff login to his local account using his password

Saturday

1. staff called and his desktop files are gone and document files are gone
2. IT check the Users folder there are particular folders:
3. john and john.contoso1-pc
4. both folders empty
5. outlook not connected
6. account is totally FRESh
7. IT check on webmail under Domain Alpha, not working the usual password, webmail.contoso.com/owa
8. after an hour, the usual password works
9. IT tried to connect MS outlook 2003 using operations@contoso.com not working saying "outlook.pst is not offline file"

PROBLEM:

1. files are gone :(
2. Totally FRESh account

I don't know what happen, guys please help, the FIles are gone.

Hoping your best solution.

THanks.