Itunes startup problems after reinstalling.

Hi after recently deleting quicktime from my cpu in a moment of stupidity my itunes would no longer start up. To fix this I re-installed itunes from scratch, however now when i try to start the program I get this message "This application has failed to start becuase AVfoundationCF.dll was not found. RE- installing the application may fix this problem" followed by "itunes was not installed correctly please reinstall, Error7 (windows error126) . can anyone help me with this problem please. Should I try and re-install it all over again or something idk ; /. Thanks xx

"The feature you are trying to use is on a network resource that is unavailable....
click ok to try again or enter an alternative path to a folder containing the installation package ""appleapplicationsupport.msi"" in the box below "
I haven't seen one of those mentioning an AppleApplicationSupport.msi for a while.
Unfortunately, this sort of trouble has gotten more complicated to deal with ever since Microsoft pulled the Windows Installer CleanUp utility from their Download Center on June 25. First we have to find a copy of the utility.
Let's try Googling. (Best not to use Bing, I think.) Look for a working download site for at least version 3.0 of the Windows Installer CleanUp utility. (The results from mydigitallife and Major Geeks are worth checking.)
After downloading the utility installer file (msicuu2.exe), scan the file for malware, just in case. (I use the free version of Malwarebytes AntiMalware to do single-file scans for that.)
If the file is clean, to install the utility, doubleclick the msicuu2.exe file you've downloaded.
Now run the utility ("Start > All Programs > Windows Install Clean Up"). In the list of programs that appears in CleanUp, select any Apple Application Support entries and click "Remove".
Quit out of CleanUp. Restart the PC, and try another iTunes install. Does it go through properly this time?

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