Can't install/uninstall iTunes

Question

i've been getting the blue screen for a couple of weeks now...i'm freaking out cause i'm scared all this is damaging my computer... HELP! after a couple of weeks of blue screen, THIS is happening now:
it all starts with me trying to run iTunes and i would get this:
"iTunes cannot run because some of its required files are missing. Please reinstall iTunes"
and so i try... i downloaded the newest version from the website and when trying to run the setup windows installer would give me this:
"the feature you are trying to use id on a network resource that is unavailable. Click OK to ry again, or enter an aternate path to a folder containing the installation package "iTunes.msi" in the box below"
it gives me a browsing option to locate the source. when i did finally find an "iTunes.msi" and i click OK it gives me:
"the file C:/WINDOWS/Downloaded Installations/......./iTunes.msi is not a valid installation package for the product iTunes. Try to find the installation package "iTunes.msi" in a folder from which you can install iTunes"
even if i try browsing to the downloaded setup it won't work. when i finally run out of options and click on cancel it would show:
"the installation source for this product is not available. Verify that the source exists and that you can access it"
and that's about it. This will show if i try to install, uninstall or repair... so nothing works... ANY IDEAS? please

Answer 1

okay, we can actually proceed on two fronts with this.
as a preliminary, right-click on some of the Minidumps, and check the "Date Created". we're looking for dumps that were created with the itunes-related crashes that you were getting.
front one: let the Apple Engineers have a look
find some of the itunes-related minidumps and send them as attachments to this email address.
in the email to Roy, be sure to include the following information:
- A link to the thread on Apple Discussions where the issue is being discussed
- The username you are using in the thread
- The version of iTunes you are using or trying to use
- the version of Windows you are using (mention service packs)
- A concise description of the issue you are seeing
- The exact text of the error message you are seeing
front two: we can try analysing the dumps ourselves
Debugging crash dumps:
1. Download and install the Windows debugging tools from here:
<http://www.microsoft.com/whdc/devtools/debugging/installx86.mspx>
2. Go to Start, All Programs, Debugging Tools For Windows, Windbg
Once you open Windbg, you will presented with a blank screen.
3. Click on File, Symbol File Path. Here you will enter the symbols path. Symbols are needed to effectively debug.
The path will be:
SRVc:symbolshttp://msdl.microsoft.com/download/symbols
4. Enter in this path and click OK. Now, go to File, Save Workspace so that your symbols path is saved for future use.
5. Go to File, Open Crash Dump and load the file. You will get a message to save base workspace information. Choose no.
Now you will get a debugging screen. It takes a little bit to run it, as the symbols have to be downloaded as they are needed. You can get more details by typing "!analyze -v" in the debugger.
Try doing a Google search for the name of the component that caused the crash, and then dig around on the net for anything useful.
(also post back here with the name of the component, so i can have a look, too.)
Sometimes you need to drop the file extension (.sys, .exe, etc) in order to find relevant info.