Itunes won't start and Quicktime, too

've been trying to search for answers in the forum regarding my problem. Tried uninstalling and reinstalling but it still doesn't work. I used to have Windows Professional 2000 but recently our IT guys changed it to Windows XP. Itunes and Quicktime work perfectly fine before but now it doesn't. Whenever I launch Itunes, it shows the following message:
Itunes has encountered a problem and needs to close. We are sorry for the inconvenience.
Quicktime doesn't even want to launch at all. Tried uninstalling Quicktime and it says it's got fatality error and won't even be unistalled.
Help!! I knew I encountered this problem last year and somehow solved it then but I forgot how I did it. Anyone who can remind me or help will be greatly appreciated!!!

So I try to uninstall Quciktime, but guess what? The uninstaller refuses to work and it won't appear in the "Add/remove" programs control panel applet.
let's try this first.
Download and install the Windows Installer CleanUp utility. then use it to clear any existing QuickTime installation configuration information from your PC:
Description of the Windows Installer CleanUp Utility
Next, we’ll manually remove leftover program files and folders.
1. On the Start menu, click My Computer (or double-click My Computer on the Desktop).
2. In My Computer, open Local Disk.
3. Open Program Files.
4. Right-click on the QuickTime folder and click Delete from the shortcut menu.
5. Navigate to C:\Windows\system32\.
6. Remove the files QuickTime.qts and QuicktimeVR.qtx.
7. Restart your computer.
after the PC has restarted, we'll try to get a fresh copy of QuickTime into that PC by doing a repair install of itunes.
in Add/Remove, select iTunes. click "Change", and then click "Repair".
if the repair install goes through okay, does iTunes launch properly again?

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I am going to add to the long list of outrage. I JUST purchased (like literally...9 hours ago...) an 8GB iPod Touch and after installation I ran into the EXACT same problem. Since I am a new owner this is the first time I have iTunes installed on my computer. So of course I downloaded the most recent version (as instructed). Like everyone else in this thread is saying, you try to open up the iTunes application but the GUI doesn't appear at all. Apparently "something" is running because its process is active in the Task manager but there is nothing on my screen! What's the problem here??? I've done everything short of reinstalling XP (thats actually kind of unnecessary as you shouldn't have to uninstall an entire OS just to get an application to work...update files or clean the registry--sure...uninstall then reinstall--no..). Yes, obviously this is an Apple product so there won't be many (if any) conflicts when connecting to an Apple device (like a Macbook). But seriously guys....seriously???
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My wife has been having this trouble for awhile, and now I started having the same trouble too. She has an iMac G5 running latest versions of Leopard and iTunes. I have a Power Mac G4 (Gigabit Ethernet model) running the latest version of Tiger and iTunes I also have a USB 2.0 PCI card which has already been tested and is operating properly. Both of our iPhones are the original model running iPhone 2.0, but this problem was happening on her setup before the 2.0/MobileMe fiasco.
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AND ALSO I TOTALLY UNINSTALLED ANY OF MY
ANTIVIRIS THINGYS AND THE SPYWARE STUFF.I D/K WHAT TO
DO ANYMORE!
*~PLEZ HELP ME!~*
Hi yesy
If you are sure you disabled your AV/antispy and you get the flash of a licence it sounds like you may have a malware infection. Look out for posts by b noir and get hold of ewido - its a free AV programme - google and you should find.
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Local retailer custom built pc. Pentium 4 chip 2.4GHz Windows XP SP2 20Gb iPod
Local retailer custom built pc. Pentium 4 chip 2.4GHz Windows XP SP2 20Gb iPod

Please help - iTunes won't start anymore: unknown error -69

Hello out there,
please can anybody help me: all of a sudden my iTunes won't start any more - it only shows a message stating an unknown error -69 and then quits.
I did not change anything on my system before that, so I just don't know what could trigger that...
I am using iTunes 7.0.2 on Windows XP SP2, both German versions.
Before posting this question I searched the archives and tried the following, all to no avail:
1. disabled "safe mode" in QuickTime audio options -> problem remains
2. set speakers to "stereo headphones" in Windows sound options -> problem remains
3. deinstalled iTunes, downloaded the installation file again and reinstalled it -> problem remains
4. deinstalled iTunes and QuickTime, downloaded QuickTime stand-alone version, installed this and afterwards iTunes again -> problem remains
5. deinstalled iTunes and QuickTime again, deleted all iTunes and QuickTime data folders, reinstalled everything again -> problem remains
6. ran a CHKDSK an the drive iTunes is on -> no problems found
It still won't start, always giving this unknown error -69.
Please, does anybody know what to do?
Any hints and help are much appreciated!
Thanks a lot
and best regards
Frank
PC Windows XP

See if this helps: iTunes displays a -69 error when syncing iPod

Itunes won't start-says it has to shut down

i started having problems with itunes and downlaoded the new itunes. won't start. in the error report it sayd its a compatability issue. when i send the report to ms though, they claim it to be an itunes problem. i could use a lot of help.

+when i tried to start quicktime it produced the same message as itunes with a little change to it. in the last part of the code it was 1482appcomp.txt.+
That problem will be causing the iTunes problem.
So let's try swapping out your existing QuickTime for a fresh copy.
Head into your Add/Remove programs. Uninstall QuickTime.
Next, we’ll manually remove any leftover program files and folders.
1. On the Start menu, click My Computer (or double-click My Computer on the Desktop).
2. In My Computer, open Local Disk.
3. Open Program Files.
4. Right-click on the QuickTime folder and click Delete from the shortcut menu.
5. Navigate to C:\Windows\system32\.
6. Remove the files QuickTime.qts and QuicktimeVR.qtx. (If “Hide filename extensions for known file types” is enabled on the PC, then those two files will appear as “QuickTime” and QuickTimeVR”.)
7. Restart your computer.
Next, we'll get a fresh copy of QuickTime into your PC by doing a repair install of itunes.
Switch off antivirus and antispyware applications prior to the repair install.
Go into Add/Remove and select itunes. click "Change" and then click "Repair".
If the repair install goes through okay, restart the PC and try launching itunes again. Does it launch properly now?
(If, however, you get an error message on any of the install or uninstalls, let us know what that message says. Precise text, please. Include any error message numbers if you're getting any.)

Itunes won't start and Quicktime, too

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