Itunes and qt not loading + can't uninstall qt - error 0x80040707 ...

Question

Hi,
i've got a German Windows XP (home edition) Service Pack 2 with all Updates and can install itunes with qt without problems, but if i doubleklick on the itunes icon, nothing happens! The pc is loading a short time but stops then an nothings happens .... the same situation is, when i klick on *.mov files and if i want to start qt. I tried to uninstall and reinstall itunes but nothing changes (even if i try an older version of itunes). Then I tried to uninstall an reinstall QT, but when start the uninstallation of qt, there is an error (0x80040707 ... something with dll) and he shuts down the uninstallation, after I clicked yes when he askes me if I really want to uninstall QT.
so please help me ... I was in this forum for hours the last days and read a lot of problems witch were similar to mine, but none of the advices helpt me (tried ad-aware, ewido and so on)
PS: sorry for my bad english, I'm german...

Answer 1

Tried opening Quicktime - same. Tried Quicktime settings from control panel - a Fatal error has occured.
that corresponds to a "standalone 1603" error message on earlier versions of the itunes and quicktime installers.
let's try this first.
here's what we'll try 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.
once we've got all the existing QuickTime scraped away, let's try a careful standalone QT 7.1.3 reinstall.
download and save a copy of the QT 7.1.3 standalone installer to your hard drive. (we'll run the install from there rather than online.) switch off antivirus and antispyware applications prior to the install.
Quicktime 7.1.3 Installers … get the one that doesn’t mention itunes
if that install goes through okay, reboot the PC and try another itunes install. does that go through okay this time?
(if you get an error message on the QT standalone reinstall, let us know what it says. include error message numbers if you're getting any.)