file integrity checking


I have a installer and another friend of mine took it from me. He cannot install and i can install the file. So, how can i check the integrity of the file he has got?

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I would check the Hash if its same.

I use HashTab to check the Hash.

Is he getting an error? If yes can you post it here?
If it an MSI file copied from the AppData folder that file may belong to the OS it was installed on. x 64 bit x 32?
They should match?
Maybe he should check his version of Microsoft Installer.
Windows Installer
jazzIIIloveAuthor Commented:
Hi awawada;

It's an msi. So, your program doesn't yield anything.

Hi Merete;

It's a .NET 4.0 msi.

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Ok thanks
May I ask what it is for? From my above Link
The installer ensures that all the packages belonging to a multiple-package transaction are installed or none of the packages are installed.
If he right click it and run as administrator?
jazzIIIloveAuthor Commented:
Hi Merete,

To clarify, how can the user check the installer? I am lost (due to my laziness to reply in timely fashion)

I don't know jazzIIIlove but at a guess the digital signature could be broken. if it is a digitally signed MSI-file windows would check it's validity
I did source this
To observe this open the exe in a hex editor, like this
or this one
 delete around the last 16 bytes and save the file back to disk.
The install will function normally, no integrity check is performed!
jazzIIIloveAuthor Commented:
16 bytes? So 16 blocks of hex values?
I was hoping you'd know?
Doesn't it depend on the form used?
Which one did you download

Check this out jazzIIIlove this seems simpler than checking the msi instead you could unpackage the msi
scroll down to>What is MSI?
MSI - Windows Installer - Code and Utilities

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Windows 7

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