C:\>esentutl /p %systemroot%\System32\catroot2\{F750E6C3-38EE-11D1-85E5-00C04FC2
95EE}\catdb
Extensible Storage Engine Utilities for Microsoft(R) Windows(R)
Version 6.1
Copyright (C) Microsoft Corporation. All Rights Reserved.
Initiating REPAIR mode...
        Database: C:\Windows\System32\catroot2\{F750E6C3-38EE-11D1-85E5-00C04FC2
95EE}\catdb
  Temp. Database: TEMPREPAIR2724.EDB
Checking database integrity.
                     Scanning Status (% complete)
          0    10   20   30   40   50   60   70   80   90  100
          |----|----|----|----|----|----|----|----|----|----|
          ...................................................
Integrity check successful.
Note:
  It is recommended that you immediately perform a full backup
  of this database. If you restore a backup made before the
  repair, the database will be rolled back to the state
  it was in at the time of that backup.
Operation completed successfully in 7.98 seconds.
C:\>
Above is the results of the steps below:      I did not dare do the 'Create a new catroot2 folder'...unless you tell me to do so...
1 Click Start, point to All Programs, and then click Accessories.
2 Right-click Command Prompt, and then click Run as administrator.
3 If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
4 In the command prompt window, type net stop cryptsvc to stop Cryptographic Services, and then press ENTER.
5 Type esentutl /p <%systemroot%>\System32\catroot2\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}\catdb, and then press ENTER.
   By default, %systemroot% is located at C:\Windows.
6 Click OK to confirm that you should run this tool only on databases that are corrupt.
7 If Esentutl reports that the catalog database is still corrupt, you should use one of the following procedures to create a new catroot2 folder.
8 Type net start cryptsvc to start Cryptographic Services, and then press ENTER.