Exchange 2010 SP2 Setup Error

Got this error installing Exchange 2010 SP2 on Windows 2008 R2 with Exchange 2010 SP1 CAS/HUB/MBX role:

Mailbox role

Error: this server role can't be installed because the following roles aren't current: AdminToolsRole

Solution:

1. HKLM\Software\ExchangeServer\V14\AdminTools\ConfiguredVersion

    Change ConfiguredVersion from 14.1.218.5 to 14.2.247.5

2. Restart server and start Exchange 2010 SP2 Setup

Exchange 2010 SP2 Setup Failed while performing the action 'install'

Got this error installing Exchange 2010 SP2 on Windows 2008 R2 with Exchange 2010 SP1 CAS/HUB/MBX role:Some controls aren’t valid. Setup previously failed while performing the action “Install”. You can’t resume setup by performaing the action “BuildToBuildUpgrade”.

Cause:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ExchangeServer\v14\MailboxRole\Action
Action key is present with value data: Install

Solution:
Delete Action key under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ExchangeServer\v14\MailboxRole