Q: itunes error 2

The 2 is usually related to Apple Application Support failing to install.

Let's try a standalone Apple Application Support install. It still might not install, but fingers crossed any error messages will give us a better idea of the underlying cause of the issue.

Download and save a copy of the iTunesSetup.exe installer file to your hard drive:

http://www.apple.com/itunes/download/

Download and install the free trial version of WinRAR:

http://www.rarlab.com/

Right-click the iTunesSetup.exe, and select "Extract to iTunesSetup". WinRAR will expand the contents of the file into a folder called "iTunesSetup".

Go into the folder and doubleclick the AppleApplicationSupport.msi to do a standalone AAS install.

Does it install properly for you? If so, does iTunes launch properly now?

If instead you get an error message during the install, let us know what it says. (Precise text, please.)

You're welcome, Ted. Glad to have been of some help.

Hi b noir, Could you please solve this error too? I recently changed from Vista to Windows 7, but now i am unable to install I tunes... please help. Thanks.

Problem signature:

  Problem Event Name:    APPCRASH

  Application Name:    iTunesSetup.exe

  Application Version:    10.5.1.42

  Application Timestamp:    4ebfa332

  Fault Module Name:    modemInst.dll

  Fault Module Version:    0.0.0.0

  Fault Module Timestamp:    49c4ba1b

  Exception Code:    c0000005

  Exception Offset:    000013dd

  OS Version:    6.1.7600.2.0.0.256.48

  Locale ID:    16393

  Additional Information 1:    0a9e

  Additional Information 2:    0a9e372d3b4ad19135b953a78882e789

  Additional Information 3:    0a9e

  Additional Information 4:    0a9e372d3b4ad19135b953a78882e789

  Fault Module Name:    modemInst.dll

  Fault Module Version:    0.0.0.0

... That's a new one on me, @kki, but I did some googling and saw that a few other people have reported it here and there.

It's a driver file associated with some communications software of some description, but I'm not sure quite which communications software (or which device it is associated with).

Could you check something for me please? Do a file search on your PC for modemInst.dll. What's the full filepath for the location in which you find modemInst.dll?

(For example C:\Program Files\SomethingSomething\SomethingElse\modemInst.dll)

Thanks so much b noir...now I am confident that this issue will get resolved  

yeah got this in search:     C:\Program Files\MMX300G 3G USB Manager\Driver

3G USB modem is a the one i use to connect internet...pls advice what should i do now?

It just striked to uninstall the modem and run Itunes, it works!  But I am just curious to know how is the modem connected to it?!!!!? Anyways thanks so much b noir

excellent news!

The iTunes upgrade involves some work on the USB and communications setup for your PC (USB drivers and ethernet drivers in AMDS and some USB-related stuff with the iPod service), so over the years there's been driver related problems with installs on some systems with certain kinds of USB drivers and software installed. In the mid-2000s, there were intermittent troubles with some HP USB printers for example. So I think that's what we're looking at here.

Many thanks for rep[orting back with your resolution. There's a forum here for L6 and above members where we can report this sort of thing, so I'll write up a topic on this there today. So fingers crossed the right people at Apple will be looking at that, and we can get a better workaround or fix for this

I tried this and got this error message:

An error occurred during the installation of assembly 'policy.8.0.50727.6195",publicKeyToken="1fc8b3b9a1e3b",processorArchitecture="x 86" Please refer to Help and Support for more information. HRESULT:...

that's is. what do I do?

An error occurred during the installation of assembly 'policy.8.0.50727.6195",publicKeyToken="1fc8b3b9a1e3b",processorArchitecture="x 86" Please refer to Help and Support for more information. HRESULT:...

These ones are typically caused by underlying problems on the PC that also often cause Windows Updates to fail to install. If we can fix the Windows Update trouble, we can usually get the iTunes trouble cleaned up en passant.

Go into your Windows update and try to check for new updates. If updates install, stock up on the ones you're behind on, restarting the PC if requested to do so. After the restart, try installing iTunes again. Does it go through this time for you?

If windows updates fail to install, go into your Update History and doubleclick the failures. What alphanumeric codes appear for you? (For example, 8007000B.)

Thanks b noir, I could not understand all; apart from alphabets !!! Keep up the good work, I will approach you any time if I need any such help.

Hi I have been getting this error too and tried what you said but the msi turns into a dll file when unpacked and I can do nothing.Any ideas please Thanks

Cancel my last comment guys but still wont install error saying Error writing to fileC:|Program Files x86|Common Files\Apple|Apple Application SupportAVFoundationCF.resources|AVCFAsset Export preset.plist.Verify that you have access to that directory.Help

wont install error saying Error writing to fileC:|Program Files x86|Common Files\Apple|Apple Application SupportAVFoundationCF.resources|AVCFAsset Export preset.plist.Verify that you have access to that directory.

That one's consistent with disk/file damage. The first thing I'd try with that is running a disk check (chkdsk) over your C drive.

XP instructions in the following document: How to perform disk error checking in Windows XP

Vista instructions in the following document: Check your hard disk for errors

Windows 7 instructions in the following document: How to use CHKDSK (Check Disk)

Select both Automatically fix file system errors and Scan for and attempt recovery of bad sectors, or use chkdsk /r (depending on which way you decide to go about doing this). You'll almost certainly have to schedule the chkdsk to run on startup. The scan should take quite a while ... if it quits after a few minutes or seconds, something's interfering with the scan.

Does the chkdsk find/repair any damage? If so, can you get an install to go through properly afterwards?