Invalid signature so update to 11.01 wont load

When I try to update to Itunes 11.01 Iget a reply "Files shared by these updates " has an invalid signature. It will not be installed. I am trying to update from 10.6.3.25 to 11.0 but the files refuses to go past initial download. Any one know what I can do.
I'm using my PC on Wndows 7 for ITunes.

Hi Mark
You say everything is up to date? And you have tried reinstalling all the CC apps? Is Windows also fully up to date? Hmmm... That could be tricky.
What version of Windows are you using? Have a look in Task Manager > Processes and see if 'CEPServiceManager.exe *32' is listed as running?
If not, I don't know where it would be installed from, and we'd need someone like Chris Cox to join the thread to tell us, but my guess is that it would install along with the CC Desktop Application Manager. Windows 8.1 can be problematic, and a bit fussy about the order of things, and it is definitely worth adopting best practice when installing your CC apps. That means restarting your computer, and right clicking the Desktop Application manager and running as Administrator.
How many CC apps are you running? If just Photoshop, Bridge, Expansion manager etc. then - and I hate to say this - perhaps have another go at reinstalling, but run the Cleaning tool after uninstalling.
Use the CC Cleaner Tool to solve installation problems | CC, CS3-CS6
Try some other Extensions before the Tony Kuyper's TKActionv3. GuideGuide is a favourite of mine, as well as Dmonzon tools, and maybe Russell Brown's Flypaper Textures.
I have to say that I have had problems with the CC Extension Manager a while back, but simply reinstalling just the Extension Manager fixed it. Perhaps CEPServiceManager.exe *32 installs with Extension Manager? Heck, maybe start with just trying that before reinstalling all your CC apps.
If you are still stuck, I'd risk sending Chris Cox a PM, but not until you triple check that your video card driver is up to date from the card maker's website.
Good luck, and be sure to let us know how you get on.

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Follow these instructions to completely remove Apple software
http://support.apple.com/kb/HT1923
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http://www.piriform.com/ccleaner/download/standard
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http://www.apple.com/itunes/
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Hello mms math 8,
Thank you for using Apple Support Communities.
For more information, take a look at:
iOS devices: Keeping device within acceptable operating temperatures
http://support.apple.com/kb/ht2101
Use iTunes to restore your iOS device to factory settings
http://support.apple.com/kb/ht1414
Use iTunes to back up your device and transfer and sync any additional content to your computer.
iPhone and iPod touch: Charging the battery
http://support.apple.com/kb/ht1476
About battery life and the battery
Battery life and number of charge cycles vary by use and settings. Find more information about batteries foriPhone and iPod.
Find information on how long the battery is expected to last between charges.
Rechargeable batteries have a limited number of charge cycles and may eventually need to be replaced.
http://www.apple.com/batteries/iphone.html
Have a nice day,
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tried using apple updater, invalid signature, tried updating both seperately didnt work, uninstalled and deleted everything remotely close to itunes including my music, tried installing from apple with same result, tried downloading in both IE and firefox (just for humor),tried doing a handstand and praying to buddha, nothing works.
Looks as though tons of people are having problems / fairly upset with apple right now. A few people have come up with solutions that work for other people but not me. I wouldnt care if I hadn't spent money on an itouch already (had used itouch on an old system, was willing to erase and use on new system).
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Message was edited by: polydorus

When I try to update to Itunes 11 I get an error message saying that Itunes has an invalid signature and wont be installed. I use Windows 7.

Everytime I try to update to Itunes 11 I get an error message saying that Itunes has an invalid signature and can't be installed? I have tried to install it two times and get the same message each time. Any solutions to my problem?? Those who have installed ITUNES 11 is it hard to work with? maybe im lucky it wont update?? I don't know.

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Invalid signature so update to 11.01 wont load

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