Exchange management tools error "reboot from a previous installation pending"

Question

I am trying to install the Exchange 2010 Management Tools onto a client. We have Exchange 2010 running already elsewhere, but have been doing RDP to the server in order to add mailboxes, etc., need to have more administrators on their own Windows 7 client
computers doing remote management.
Windows 7 Enterprise (64bit) client computer in same domain as Exchange servers, UAC disabled, logged in as a domain administrator. Fresh restart. No updates pending. Noticed article
http://technet.microsoft.com/en-us/library/cc164360(v=exchg.80).aspx "A Restart from a Previous Installation is Pending" and numerous posts that indicated I should
clear "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\UpdateExeVolatile" or clear "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\PendingFileRenameOperations" - but neither of these keys
exist on my computer!
Downloaded and unzipped Exchange2010-SP3-x64.exe to C:\Temp
Ran C:\Temp\setup.exe
Checked off the options:  a) Error Reporting - Yes (Recommended). b) Custom Exchange Server Installation. c) Select "Management Tools". d) LEAVE UNSELECTED "Automatically install Windows Server roles and features required for Exchange". 
Get the following errors
Summary: 3 item(s). 1 succeeded, 2 failed.
Elapsed time: 00:00:22
Configuring Prerequisites
Completed
Elapsed Time: 00:00:01
Management Tools Prerequisites
Failed
Error:
A reboot from a previous installation is pending. Please restart the system and rerun setup.
Click here for help...
http://technet.microsoft.com/en-US/library/ms.exch.err.default(EXCHG.141).aspx?v=14.3.123.3&e=ms.exch.err.Ex28883C&l=0&cl=cp
Warning:
Setup cannot contact the primary DNS server (172.17.253.51) using TCP port 53. Check that the IP address of the DNS server is correct and that the DNS server is reachable.
Elapsed Time: 00:00:17
Languages Prerequisites
Failed
Error:
A reboot from a previous installation is pending. Please restart the system and rerun setup.
Click here for help...
http://technet.microsoft.com/en-US/library/ms.exch.err.default(EXCHG.141).aspx?v=14.3.123.3&e=ms.exch.err.Ex28883C&l=0&cl=cp
Warning:
Setup cannot contact the primary DNS server (172.17.253.51) using TCP port 53. Check that the IP address of the DNS server is correct and that the DNS server is reachable.
Elapsed Time: 00:00:03
Already have reviewed many articles on this topic, none seem to apply to my situation. I am going crazy trying to solve it.

Answer 1

As I've said this workstation meets the requirements for installation of the Management Tools. It is 64bit.
Thanks for the link to the exchangeserverpro.com installation instructions blog. It is something I had already reviewed. There are many comments with problems, so many in fact it is confusing what finally worked for people who ran into snags.
Many also reported the "reboot from a previous installation is pending" problem (that I am getting), but their solution to that problem is not obvious, since, as I originally posted, the Microsoft answer to that error message is contained in "http://technet.microsoft.com/en-us/library/cc164360(v=exchg.80).aspx"
and the registry keys do not exist on my Win7 client. The other solution in the comments seemed to be to exclude the "Automatically install Windows Server roles and features required for Exchange" during install (but so far Ed and Rajith want
me to include that option). The blog is quite old, and so I hoped the SP3 for Exchange 2010 would have fixed the installer issues identified in the comments on that blog... but apparently not!
DNS is working in our environment. The IP address in the error message points to a network load balancer (NetScaler by Citrix) and does not respond on telnet using port 53... It is our standard DHCP-provided configuration for client DNS. (Does the
Exchange installer for Management Tools have some unique DNS requirements beyond normal name resolution? If so, does the Exchange admin need DNS admin rights?) Just to remove the load balancer from the equation, I changed my Win7 client network adapter settings
to use two real, physical actual Microsoft AD domain controllers to resolve DNS. I performed an IPCONFIG /FLUSHDNS. Then re-ran the Exchange 2010 installer. The specific error for DNS has gone away now that I am not using our enterprise's standard load balancer
DNS client configuation. I really need to know why this is an Exchange management tools requirement. Any ideas?
But still no-go on getting the Exchange 2010 Management Tools to install. Here are the latest errors on the Readiness Checks:
Summary: 3 item(s). 0 succeeded, 3 failed.
Elapsed time: 00:00:25
Configuring Prerequisites
Failed
Error:
The following error was generated when "$error.Clear();
          if($RoleInstallWindowsComponents)
            # Install any Windows Roles or Features required for the Management Tools role
            if ($RoleIsWindows8OrHigher)
              if($RoleADToolsNeeded)
                $ADToolsNeeded = 1
              else
                $ADToolsNeeded = 0
              Invoke-Expression " Powershell -Command {& $RoleBinPath\InstallWindowsComponent.ps1 -ShortNameForRole AdminTools -ADToolsNeeded $ADToolsNeeded} "
            else
              Install-WindowsComponent -ShortNameForRole "AdminTools" -ADToolsNeeded $RoleADToolsNeeded
        " was run: "The system cannot find the file specified".
The system cannot find the file specified
Click here for help...
http://technet.microsoft.com/en-US/library/ms.exch.err.default(EXCHG.141).aspx?v=14.3.123.3&e=ms.exch.err.Ex88D115&l=0&cl=cp
Elapsed Time: 00:00:01
Management Tools Prerequisites
Failed
Error:
A reboot from a previous installation is pending. Please restart the system and rerun setup.
Click here for help...
http://technet.microsoft.com/en-US/library/ms.exch.err.default(EXCHG.141).aspx?v=14.3.123.3&e=ms.exch.err.Ex28883C&l=0&cl=cp
Elapsed Time: 00:00:20
Languages Prerequisites
Failed
Error:
A reboot from a previous installation is pending. Please restart the system and rerun setup.
Click here for help...
http://technet.microsoft.com/en-US/library/ms.exch.err.default(EXCHG.141).aspx?v=14.3.123.3&e=ms.exch.err.Ex28883C&l=0&cl=cp
Elapsed Time: 00:00:03
If I remove the "Automatically install Windows Server roles and features required for Exchange" on the installer, I do not get the PowerShell error, just the "installation is pending" errors:
Summary: 3 item(s). 1 succeeded, 2 failed.
Elapsed time: 00:00:39
Configuring Prerequisites
Completed
Elapsed Time: 00:00:00
Management Tools Prerequisites
Failed
Error:
A reboot from a previous installation is pending. Please restart the system and rerun setup.
Click here for help...
http://technet.microsoft.com/en-US/library/ms.exch.err.default(EXCHG.141).aspx?v=14.3.123.3&e=ms.exch.err.Ex28883C&l=0&cl=cp
Elapsed Time: 00:00:12
Languages Prerequisites
Failed
Error:
A reboot from a previous installation is pending. Please restart the system and rerun setup.
Click here for help...
http://technet.microsoft.com/en-US/library/ms.exch.err.default(EXCHG.141).aspx?v=14.3.123.3&e=ms.exch.err.Ex28883C&l=0&cl=cp
Elapsed Time: 00:00:02
Which puts me right back to where I started in this thread.