Error Message Mapi32.dll After You Upgrade to Windows XP

ERROR : A required component is missing: OMI9.DLL. Please install Microsoft Outlook again.

CAUSE : This issue may occur if either of the following conditions is true: 

• Outlook is configured to run in compatibility mode.
  
  -or-
  
  
• Your user profile is corrupted.

SOLUTION : After you upgrade to Microsoft Windows XP, you cannot start Outlook 2000.

To resolve this issue, follow these steps:

1. Click Start, and then click Search.
2. Click All files and folders.
3. In the All or part of the file name box, type Outook.exe, and then click Search. By default, the Outlook.exe file is located in the following folder:
   C:\Program Files\Microsoft Office\Office10\
4. Right-click the Outlook.exe file, and then click Properties.
5. Click the Compatibility tab, and then click to clear the Compatibility mode check box.
6. Click to clear any check boxes that are selected under Display settings.
7. Click Apply, and then click OK.
8. Start Outlook.

If the previous steps do not resolve the issue, then you may have to create a new user profile. To do so, follow these steps:

1. Restart the computer in Safe mode. To start the computer in Safe mode, follow these steps:
   • Click Start, click Shut Down, and then click Shut down.
   • In the Shut Down Windows dialog box, click Restart, and then click OK.
   • When you are prompted to select the operating system to start, press F8.
   • Use the ARROW keys to select the appropriate Safe mode option, and then press ENTER.
   • If you have a dual-boot or multiple-boot system, use the ARROW keys to select the installation that you want, and then press ENTER.
2. Log on to the computer as an administrator.
3. Create a new user account with Administrator permissions. To do this, follow these steps:
   • Open User Accounts in Control Panel.
   • Click Create a new account.
   • Type a name for the new user account, and then click Next.
   • Click Computer administrator, and then click Create Account. Click OK.
4. If you are using the NTFS file system, you have to modify the permissions on your old profile.
   
   NOTE: If you are using the FAT file system, do not follow steps a through c. Continue with step 5.
   
   To modify the permissions on your old profile, follow these steps:
   
   • Using Windows Explorer, right-click your old user profile folder, and then click Properties. By default, this folder is Drive_letter:\Documents and Settings\User_name, where Drive_letter is the drive on which Windows XP is installed and User_name is your user name.
   • On the Security tab, click your new user profile in the Name list, and then click to select Allow for the Full Control permission.
     
     NOTE: If your user profile is not displayed in the Name list, add your profile: Click Add, click your user name in the list, and then click OK.
   • Click OK to close the dialog box.
5. Log off the computer, and then log on with the new profile.
6. In Windows Explorer, copy all of the documents from the original My Documents folder to your new My Documents folder.
   
   The original My Documents folder is in the following location
   Drive_letter:\Documents and Settings\User_name\My Documents
   where Drive_letter is the drive on which Windows XP is installed and User_name is your old user name.
7. To retain the Internet favorites links, copy all of the Internet shortcut files from the original Favorites folder to the Favorites folder of the user profile that you created.
   
   NOTE: Do not copy Desktop.ini file in the favorites folder.
   
   The Favorites folder is in the following location:
   
   Drive_letter:\Documents and Settings\User_name\Favorites
8. Restart Outlook, and then follow the steps in the wizard to re-create your user profile.
9. If you want to, you can follow these steps to import your old personal folder (PST) file into Outlook:
   • On the File menu, click Import And Export.
   • Click Import from another program or file, and then click Next.
   • In Select the file type to import from, click Personal Folder File (.pst), and then click Next.
   • In File to Import, click Browse to locate the PST file you want to import, and then click Next. If you know the path, type it in the box.
   • In Select the folder to import from, click the folder containing the data you want to import.
     
     If the folder contains subfolders, and you want to include this data in the import process, click to select Include Subfolders. If the destination for importing is the currently selected folder, click Import items into the current folder; otherwise, click Import items into the same folder in. This will create matching items in the destination folder you select.
   • Click Finish.
10. If you want to, you can remove the Administrator permissions from the new user account. To change a user's group or account type, follow these steps:
    
    • Open User Accounts in Control Panel.
    • Click the user's account name.
    • Click Change the account type.
    • Click the type of account you want, and then click Change Account Type.