How to manually uninstall MailEssentials 2012 from Exchange 2007/2010 ( ONLY)

Answer

1. To uninstall the MailEssentials Exchange Transport Agents:
   1. Start the Exchange Management Shell
   2. Execute the following commandlets:
      • Uninstall-TransportAgent -Identity "GfiAvSmtpAgent" 
      • Uninstall-TransportAgent -Identity "GfiAvRoutingAgent" 
      • Uninstall-TransportAgent -Identity "GfiAsSmtpAgent"
      • Uninstall-TransportAgent -Identity "GfiAsSmtp2Agent"
      • Uninstall-TransportAgent -Identity "GfiAsRtSubmittedAgent"
      • Uninstall-TransportAgent -Identity "GfiAsRtRoutingAgent"
   3. Answer [Y] Yes to confirm.
2. To remove the MailEssentials services:
   1. Open the Windows Registry Editor (Start - Run - regedit.exe)
   2. Open HKLM\SYSTEM\CurrentControlSet\Services
   3. Delete keys:
      • gfiasmlhost
      • gfiasmsecatt
      • gfimetrxsvc
      • gfipop2exch
      • GFIscanM
      • gfiscans
      • listserv
      • csecmlhost
      • msecmlhost
      • msecavupdate 
      • NOTE: Also delete any instances of these keys present in HKLM\SYSTEM\ControlSet00x\Services
3. To remove the GFI registered files:
   1. Open regedit.exe:
      • If no other GFI Products are installed, delete the GFI key from HKLM\SOFTWARE\Wow6432Node
      • If other products are installed, delete the HKLM\SOFTWARE\Wow6432Node\GFI\MailEssentials 
4. To remove shared dll counters:
   1. Delete any values with the original installation path of MailEssentials from HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SharedDLLs
      • Also, if no other GFI products are installed, delete any values with \<CommonFilesFolder>\GFI\common  
5. To remove the MailEssentials from add/remove programs:
   1. Open regedit.exe
   2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products
   3. The subkeys of this key are a bunch of letters and numbers. Go through these keys and remove the ones which have ProductName equal to GFI MailEssentials for Exchange/SMTP.
   4. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
   5. You will see a bunch of letters and numbers as subkeys of this key. Go through these keys and remove the ones which have DisplayName equal to GFI MailEssentials for Exchange/SMTP.  
   6. Some old registry keys may be located in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products
   7. You can open the gfimes_xxxxxxxxx_x_maininstall.x86 log located in %temp% and look for the entry that lists the product , such as Product: {F09AEF50-299F-409F-85D4-D36C0EF2F2F9}
   8. Then search the registry for F09AEF50-299F-409F-85D4-D36C0EF2F2F9 and remove any references.The installation should proceed at this point.
6. Reboot the machine