Itunes download problem

Restore purchased and deleted items to iPad You can redownload items from the App Store, Book Store, and iTunes Store without repurchasing them. If you're part of a Family Sharing group, you can download items purchased by other family members, too. To restore purchases that aren't on your iPad, see the Apple Support article Redownload apps, music, movies, TV shows, and books from the App Store, iTunes Store, and Apple Books.

What kind of new tablet do you use? If it's an iPad, you are able to download books to iPad directly. Just launch iTunes on your tablet and go to iTunes Store, then search for the book you need and click Get below the book cover.
When you want to download ebooks to iPad, you are able to sync the books with iTunes. Having the latest version of iTunes installed on computer, you are able to connect your iPad to computer with USB and sync ebooks to computer.

After getting the ebooks in iTunes library, you are able to sync the books to iPad easily. The following guidance will show you how to finish the task.
1. Plug iPad into computer via USB, and iTunes will launch automatically.
2. Click the iPad icon and choose Books category in the left sidebar.
3. Check Sync Books and choose All Books or Selected Books.
4. Click Sync at the right bottom to start syncing books to iPad.

After syncing books to iPad with iTunes, you will get the books in the iBooks app on iPad. Now you have an enjoyment. But note that you should shut down auto sync before you sync books with iTunes. To shut down auto sync of iTunes, you need to go to Edit > Preferences > Devices on iPad, and check "Prevent iPods, iPhones and iPads from syncing automatically".

If you have downloaded or got books from elsewhere, you can add books to iTunes at first, and then sync these ebooks to iPad. To add ebooks from computer to iTunes library, you only need to click File > Add File to Library at the upper left corner of iTunes, and then the ebooks will be added to iTunes Book Library.

Visit this guide for more methods about how to transfer books to iPad tablet. http://www.leawo.org/tutorial/download-ebooks-to-ipad.html

Purchasing ebooks through the iBooks Store is very similar to buying any other media via Apple's iTunes Store. One key difference, though, is how you access the store. Rather than through iTunes or a dedicated app like the iTunes Store app on the iPad and iPhone, in this case, you access it through the iBooks app.
In the top left corner of the iBooks app is a button that reads "Store". To access the iBooks Store and begin shopping for iPhone- and iPad-compatible ebooks, tap that button.

Once you enter the iBooks Store, the browsing and searching experience is very similar to using the iTunes Store. In this case, you can search for the author or title you want in the top-right corner search box.
To browse books, either tap the icons on the main page of the store or tap the "Categories" menu item in the top left corner. This drops down a menu with all of the iBooks store's categories in it. Tap the category you're looking for to see books in that genre.

In the iBooks Store, when you tap a book title to get more details (synopsis, reviews, etc.) a window pops up and the background grays out a bit.
In this window, you can download a free sample of the book to your iBooks library by tapping the "Get Sample" button. This is the equivalent of iTunes' 30-second song preview, which helps you get a sense of whether you want to purchase the book.
When you decide to purchase a book, tap the price on the left side of the screen next to the book cover. The button will turn green and read "Buy Book". Tap it again to buy the book.
To close the pop-up window and not buy the book, simply tap anywhere outside the window.

You buy at the iBooks Store using the same iTunes account and password as you do at the iTunes Store or App Store. When buying a book, you'll be prompted to enter your password to pay for the ebook before it will begin downloading.

Once you've entered your iTunes account password, the eBook will download to your iPad. How long this takes will depend on the book (its length, how many images it has, etc.).
When the book is done downloading, it will appear as a title on the bookshelves in the iBooks app. Tap it to begin reading.

You can't, unless you download from iTunes it won't be recognized due to a signature missing. They have other things they look for as well. You should manage your non iTunes apps via other apps. These are the issues you have to deal with when you decide to jail break unfortunately.

when i download any movie then come a dilogue box "unsuportee file

It is required to clear the temporary folder before downloading the Software. For this click 'Start' button then select 'Run' (you can open 'Run' by press and hold Windows button on the keyboard and then pressing alphabet key 'R'). Type '%temp%' inside the Run window, and you will get a folder opened. Delete all the files in the folder and close it. Now try to download the Software, it will work.
All the best.

Download some programs like Skype are vulnerable when it's not running or invalid win32 application occur. Here are a reason why:
* Maybe your Antivirus are very strong to protect on your system when it talks about downloading.
* Next is keep your operating system clean or tuneup before downloading such file on the web.
* Next is keep your system updated, for this reason there are some parts on the registry where broken and capable of not installing such skype programs.
* Last is when it's still have the problem exist even one ore more programs that are displaying win32 invalid application, reinstall your sytem.
That is all the best part when encounter the problem like this.
Good luck!

Do a system restore. start>all programs>accessories>system tools>system restore.

or in vista: just type system in the start search and click on system restore.

im going through the same problem if you solve it please email me and tell me how
[email protected]

Your PC doesn't meet the minimum requirements to run iTunes.
Check it over again here: http://www.apple.com/itunes/download/ but I don't think it can run iTunes.
This conversation confirms it: http://discussions.apple.com/thread.jspa?threadID=1846246

An invalid application message means the application cannot run on your pc.