Microsoft Outlook 2007 error

I met this error when I open email -

Could not install the custom actions. The form cache file c:\users\xxx\appdata\local\microsoft\forms\FRMCACHE.DAT is not valid content your administrator.

Go to Control Panel, Open folder options, select view tab, down the you will
see a hidden files and folder, Select show hidden files and folders.
Close the control panel.
Open my computer and search down the directories.Local Disk (C>Users>(your user name)>AppData>Local>Microsoft>FRMCACHE.DAT
Delete the folder named FORMS, its corrupt!
Close the window and open Outlook 2007, everything should work fine now.

What is eseutil.exe?

  You can use the Eseutil utility to defragment the information store and directory in Microsoft Exchange Server 5.5 and to defragment the information store in Microsoft Exchange 2000 Server and in Microsoft Exchange Server 2003. Eseutil examines the structure of the database tables and records (which can include reading, scanning, repairing, and defragmenting) the low level of the database (Ese.dll).
  Eseutil is located in the Winnt\System32 folder in Exchange Server 5.5 and in the Exchsrvr/Bin folder in Exchange 2000 and in Exchange 2003. The utility can run on one database at a time from the command line.

Exchange 2003

1). Currently Service Pack 2
2). Standard & Enterprise Edition
3). Support windows 2003 32bit version
4). Windows 2000 (need Service Pack 4)
5).Outlook Web Access
6).Outlook Mobile Access
7).Combination with Microsoft Office, Microsoft Live Communication Server, Live Meeting and Share-Point
8).Improve mail and mailbox messaging tool
9).Protect Span and Mail Box Floating attack
10). Can block sender address with domain name
11). Recipient Address, Sender Address, Mail Box Filtering Option, Intelligent Message Filtering Option
12).Exchange 2003 is already include with Microsoft Small Business Server 2003 Standard and Premium
      Edition 32bit only. Cannot be install 64 version of windows.

                             Standard              Enterprise
  Storage Group -   up to 2                  up to 4
  Database         -    max 2                   max 5
  Database Limit -    18GB                  16TB
                               75GB
                               (Service 2)

Recover delete email in Microsoft Exchange 2003 server?

1).Login as the administrator on exchange and open system manger.

2).Right clicks on the mailbox store and select properties. Change the deletion settings to 30 days for deleted items and to 30 days for deleted mailboxes, Also make sure that  the checkbox is checked for do not permanently deleted mailboxes. Click to continue.

3). Right click the manager’s mail store and select properties, change the deletion settings to 45 days for deleted items and to 45 days for deleted mailboxes also make sure that the checkbox is checked for  do not permanently delete mailboxes. Click ok to continue.

4). Login to the client pc, choose an email from inbox and delete it.

5). Open the deleted items folder and delete from the same item from this folder by right click the item and selecting delete

6). Click yes to indicate that you want to permanently delete the item.

7). Next from outlook go to tools recover deleted items

8). Choose the email from the frank that you want to recover and select the button to recover selected items.