If you have purchased a new iPad and want to copy pdf files from your Windows pc to the iPad, you need to perform the following steps:

1. Run iTunes
2. Click File and then click Add to Library
3. Select the books, or .pdf files, that you wish to transfer and then click the Choose button
4. Click Books under the Library section on the left-hand side. You will see all the transferred books on the right panel
5. Plug-in your iPad
6. Click the Books tab
7. Select the check-box against Sync Books. You can transfer all your books by selecting the All books option. Else, you can transfer a few chosen books by clicking the Selected books option
8. Click on Sync button. The selected books will now be transferred to your iPad

iTunes is usually trouble-free software, that is, it rarely behaves erratically. Usually software and drivers behave erratically when they are not updated. Downloading new software updates manually is easy, but the same is not true for drivers. That is why we recommend you to use a reliable driver update tooltool.