Itunes 11.1.4 update on Windows 7 X64

Question

My "automatic update" running on Windows 7 X64 for iTunes just "bombed" with errors.  The first and repeated error was a c++ related error 6304 which occurs when there is an incorrect or missing "manifest" for an attempted install.  The second was a 1114 Windows error telling me that the install failed.  After this occurred, I was unable to either use iTunes which had been working or to complete the install manually.  I'm now without control of my downloaded content, my appple TV and my own extensive library of mp3 and other files which had been registered with iTunes.  My attempts to follow posted directions to complete a "clean install" of iTunes for a Windows X64 system have only led to more problems!  Since none of my Apple hardware is any longer under hardware warranty due to its age, I'm caught between a rock and a hard place.   I can't get iTunes to work so I can't maintain my iPad, or serve content to my Apple TV!  This *****!  I have older versions of iTunes installed on older Windows XP and Vista computers which do not take advantage of the X64 hardware I would prefer to use to maintain my library and run my media server for the Apple TV which I've been using to serve content to my Apple TV for years. 
When I try to follow posted directions to remove certain directories in the Windows Program Files (X86) directories to get a clean install, I find the files locked by running programs, some of which help support the x86 browsers I run in addition to Microsoft Internet Explorer 11 for X64, so I'm not about to raslhy try to blow away all the software I ever got from Apple just to get a good reinstall of iTunes.   Can anyone gvie me suggestions.  I'm quite computer literate and a retired software applications engineer.

Answer 1

I managed to take the "reinstall route" too.... Here's the lates diagnostic report from my system.  I had to unistall the 32 bit drivers which Apple leaves lying around which are booted by default in Windows 7, reboot, then do a full reinstall not by downloading the full package and attempting to run the installer via the download, something that had failed a couple of times, but by "running" the installer directly from the web.  The successful install was actually executed from a 3rd party web site, not directly from Apple, something that I am normally loath to do.  Here's what the installed package says:
  Microsoft Windows 7 x64 Home Premium Edition Service Pack 1 (Build 7601)
Acer Aspire Z3731
iTunes 11.1.4.62
QuickTime 7.7.4
FairPlay 2.5.16
Apple Application Support 3.0
iPod Updater Library 11.1f5
CD Driver 2.2.3.0
CD Driver DLL 2.1.3.1
Apple Mobile Device 7.1.0.32
Apple Mobile Device Driver 1.64.0.0
Bonjour 3.0.0.10 (333.10)
Gracenote SDK 1.9.6.502
Gracenote MusicID 1.9.6.115
Gracenote Submit 1.9.6.143
Gracenote DSP 1.9.6.45
iTunes Serial Number 001DB6A80B04D9A0
Current user is not an administrator.
The current local date and time is 2014-01-23 19:52:59.
iTunes is not running in safe mode.
WebKit accelerated compositing is enabled.
HDCP is supported.
Core Media is supported.
Video Display Information
Intel Corporation, Intel(R) G45/G43 Express Chipset
Intel Corporation, Intel(R) G45/G43 Express Chipset
**** External Plug-ins Information ****
No external plug-ins installed.
Genius ID: 9d9c2ee8eeda35316ddf4323eecbe290
iPodService 11.1.4.62 (x64) is currently running.
iTunesHelper 11.1.4.62 is currently running.
Apple Mobile Device service 3.3.0.0 is currently running.
**** Network Connectivity Tests ****
Network Adapter Information
Adapter Name: {73783F5F-438E-41AF-97CD-4BE36E0AC204}
Description: Microsoft Virtual WiFi Miniport Adapter
IP Address: 0.0.0.0
Subnet Mask: 0.0.0.0
Default Gateway: 0.0.0.0
DHCP Enabled: Yes
DHCP Server:
Lease Obtained: Wed Dec 31 19:00:00 1969
Lease Expires: Wed Dec 31 19:00:00 1969
DNS Servers:
Adapter Name: {DDE044BB-6BCC-4AD9-9631-1343B10976F5}
Description: Realtek RTL8191SU Wireless LAN 802.11n USB 2.0 Network Adapter #2
IP Address: 192.168.1.100
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.1.1
DHCP Enabled: Yes
DHCP Server: 192.168.1.1
Lease Obtained: Thu Jan 23 19:49:59 2014
Lease Expires: Fri Jan 24 19:49:59 2014
DNS Servers: 75.75.76.76
75.75.75.75
192.168.1.1
Adapter Name: {D0A2626C-CFE2-4DAD-81AA-55819A8E0FB3}
Description: Intel(R) 82567V-2 Gigabit Network Connection
IP Address: 192.168.1.149
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.1.1
DHCP Enabled: Yes
DHCP Server: 192.168.1.1
Lease Obtained: Thu Jan 23 19:49:11 2014
Lease Expires: Fri Jan 24 19:49:11 2014
DNS Servers: 75.75.76.76
75.75.75.75
192.168.1.1
Active Connection: LAN Connection
Connected: Yes
Online: Yes
Using Modem: No
Using LAN: Yes
Using Proxy: No
Firewall Information
Windows Firewall is on.
iTunes is NOT enabled in Windows Firewall.
Connection attempt to Apple web site was successful.
Connection attempt to browsing iTunes Store was successful.
Connection attempt to purchasing from iTunes Store was successful.
Connection attempt to iPhone activation server was successful.
Connection attempt to firmware update server was successful.
Connection attempt to Gracenote server was successful.
Last successful iTunes Store access was 2014-01-23 19:52:13.
　This is the second successive release that has given me fits.  I'm of the opinion that the problem may have something to do with the need Apple feels that they must have their various "acceptances" of terms and conditions re-authorized on each successive version, or a poorly managed gradual migration of components from the 32 bit code base to the 64 bit code base that causes pathing problems when the automatic updater runs in this Microsoft "hybrid" 32 bit or 64 bit environent.  At any rate, uninstalling iTunes completely seems to have had only minimal impact on my library.   I did notice that the successful install paused and seems to have executed code which may have updated the structure of my library from that left behind after I unistalled the previous 11.1.3 version.  I wish they would do a better job of testing their automatic updating procedure for us poor 2nd class citizens.  I'm not going to scrap my newest intel based system just because their software testing folks focus first on Apple's version of the world.