ITunes won't open after I updated to 8.0.1

Hello,
Here's a little background on what's been going with itunes before the recent problem. These past couple weeks I've tried to update my itunes to 8.0.1 through the Apple Software Update. It never worked and at the end of the process it would tell me to try again or do it manually. Also, I downloaded two new videos today that were already in the correct format. I added it to the itunes library with no problem and tried to convert the videos to the correct format just incase it wasn't. It gave me the message that the video was already in the correct format. When I tried to sync it with my ipod it told me the videos weren't in the correct format.
Ok so for the overall the main problem right now is itunes won't open at all. I manually downloaded the update and I restarted the laptop after I finished updating itunes. Since then, itunes won't open and continuously gives me this message "The itunes application could not be opened. an unknown error occurred (-50)". I've restarted my computer a few times and looked up as many forums and solutions I could, but no luck. Please, if someone could help, let me know. Thank you.

Refer this article to remove SC Info.sidb file
http://support.apple.com/kb/TS2363
If that does not work, Repair your Quicktime. START/ CONTROL PANEL/PROGRAMS n FEATURES/highlight QUICKTIME and click REPAIR

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hello Nevada!
After installing the latest itunes update, itunes
won't open at all. I click on it and it just won't
open.
are you getting an error message? if so, what does it
say?
or are you getting no error messages whatsoever? if
so, could you let us know the results of the
following observations?
reboot your PC. open Task Manager to the Processes
Tab. now try to launch itunes again.
does an itunes.exe process appear in Task Manager? if
so, does it persist in there, or does it disappear
after a few seconds?
love, b
b noir - i have been following your advice and i want to thank you for taking your time to try and solve these problems for ipod users.
i have been following this message board each day for the past week - ever since my iTunes stopped working. i have not yet seen anyone who is receiving the same error message as myself.
like most others, i downloaded the recent update for iTunes - since then, iTunes will not open. i have tried most of the other proposed solutions to no avail, such as downloading a stand-alone version of quicktime, making sure my msconfig start-up has the correct check marks, etc.
the iTunes set-up completes with no problem - i have tried installing by saving the file to my hard drive and then running and also by running the program straight from the download window. same results.
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i was wondering if you could attempt to help me resolve this issue? i have my music saved to my external hard drive, so i am in no danger of losing my music. however, i need to open iTunes to update my iPod.
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hello Nevada!
After installing the latest itunes update, itunes
won't open at all. I click on it and it just won't
open.
are you getting an error message? if so, what does it
say?
or are you getting no error messages whatsoever? if
so, could you let us know the results of the
following observations?
reboot your PC. open Task Manager to the Processes
Tab. now try to launch itunes again.
does an itunes.exe process appear in Task Manager? if
so, does it persist in there, or does it disappear
after a few seconds?
love, b
b noir - i have been following your advice and i want to thank you for taking your time to try and solve these problems for ipod users.
i have been following this message board each day for the past week - ever since my iTunes stopped working. i have not yet seen anyone who is receiving the same error message as myself.
like most others, i downloaded the recent update for iTunes - since then, iTunes will not open. i have tried most of the other proposed solutions to no avail, such as downloading a stand-alone version of quicktime, making sure my msconfig start-up has the correct check marks, etc.
the iTunes set-up completes with no problem - i have tried installing by saving the file to my hard drive and then running and also by running the program straight from the download window. same results.
once i go to open iTunes, i receive the following error message: "iTunes has encountered a problem and needs to close. We are sorry for the inconvenience. if you were in the middle of something, the information you were working on might be lost. Please tell Microsoft about this problem." Then I click "Send Error Report" just hoping I will receive a required update to make this work.
i was wondering if you could attempt to help me resolve this issue? i have my music saved to my external hard drive, so i am in no danger of losing my music. however, i need to open iTunes to update my iPod.
thanks in advance for your help.
rence

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hello Nevada!
After installing the latest itunes update, itunes
won't open at all. I click on it and it just won't
open.
are you getting an error message? if so, what does it
say?
or are you getting no error messages whatsoever? if
so, could you let us know the results of the
following observations?
reboot your PC. open Task Manager to the Processes
Tab. now try to launch itunes again.
does an itunes.exe process appear in Task Manager? if
so, does it persist in there, or does it disappear
after a few seconds?
love, b
b noir - i have been following your advice and i want to thank you for taking your time to try and solve these problems for ipod users.
i have been following this message board each day for the past week - ever since my iTunes stopped working. i have not yet seen anyone who is receiving the same error message as myself.
like most others, i downloaded the recent update for iTunes - since then, iTunes will not open. i have tried most of the other proposed solutions to no avail, such as downloading a stand-alone version of quicktime, making sure my msconfig start-up has the correct check marks, etc.
the iTunes set-up completes with no problem - i have tried installing by saving the file to my hard drive and then running and also by running the program straight from the download window. same results.
once i go to open iTunes, i receive the following error message: "iTunes has encountered a problem and needs to close. We are sorry for the inconvenience. if you were in the middle of something, the information you were working on might be lost. Please tell Microsoft about this problem." Then I click "Send Error Report" just hoping I will receive a required update to make this work.
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hello Nevada!
After installing the latest itunes update, itunes
won't open at all. I click on it and it just won't
open.
are you getting an error message? if so, what does it
say?
or are you getting no error messages whatsoever? if
so, could you let us know the results of the
following observations?
reboot your PC. open Task Manager to the Processes
Tab. now try to launch itunes again.
does an itunes.exe process appear in Task Manager? if
so, does it persist in there, or does it disappear
after a few seconds?
love, b
b noir - i have been following your advice and i want to thank you for taking your time to try and solve these problems for ipod users.
i have been following this message board each day for the past week - ever since my iTunes stopped working. i have not yet seen anyone who is receiving the same error message as myself.
like most others, i downloaded the recent update for iTunes - since then, iTunes will not open. i have tried most of the other proposed solutions to no avail, such as downloading a stand-alone version of quicktime, making sure my msconfig start-up has the correct check marks, etc.
the iTunes set-up completes with no problem - i have tried installing by saving the file to my hard drive and then running and also by running the program straight from the download window. same results.
once i go to open iTunes, i receive the following error message: "iTunes has encountered a problem and needs to close. We are sorry for the inconvenience. if you were in the middle of something, the information you were working on might be lost. Please tell Microsoft about this problem." Then I click "Send Error Report" just hoping I will receive a required update to make this work.
i was wondering if you could attempt to help me resolve this issue? i have my music saved to my external hard drive, so i am in no danger of losing my music. however, i need to open iTunes to update my iPod.
thanks in advance for your help.
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iTunes won't open after update - help, please; MacBook Pro, Mac OSX 10.6.8, iTunes version 11.1.5.

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open Terminal
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killall iTunes
killall "iTunes Helper"
sudo rm -rf /Applications/iTunes.app/
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drag off and dump the itunes icon (which now has the ? shadow in it) off your dock.
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ITunes won't open after downloading software update. Macbook Pro OSX10.6.8 Simple solution?

iTunes won't open after downloading software update. Macbook Pro OSX10.6.8 Simple solution? And by the way, this is apparently a common problem and Apple has completely failed to warn in advance or offer a quick straightforward solution - used to be a good company, but it's becoming just another crappy screw-the-consumer corporation.

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Itunes won't open after update

My Itunes won't open since I updated it... No error messages appears and in the task manager, the process is running.. but nothing appears in Task Manager Applications! And, of course it never opens...
Someone else with the same problem found any solution?

Same thing happens to me, I installed iTunes 10 and it simply won't open when I launch it.
I don't have the bonjour service in my Task Manager so I guess I can't try that solution.
This stinks, what is wrong with this faulty version of iTunes? If I lose my iPhone data I would seriously die.
BTW I'm using Windows Vista.
PLEASE HELP!!!!

ITunes won't open after I updated to 8.0.1

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