Hi,everyone!
I am a student of University.I pay $85 for each of my ebooks and have my UoP password and username to open them.
The problem is that I want to move them to my kindle dx which does not support the password part of the pdf file.How can I remove the password protect from this file.Each page is password protected, but I only have to put in my password one time and it opens the whole ebook.However, on the kindle dx, the cursor does not go to the username or password box, so i can't open it on my kindle.I tried buying and using a PDF restrictions remover but all it does is say "Restrictions Removed" but the password protect is still on when I transfer it to the kindle.
Any suggestions of what product to use or what to do?
Pls help!!!
Thank you so much in advance.

which pdf viewer are you using on the laptop?
maybe you can use it to print the document to a file...

I don't think it allows printing (to an unencrypted pdf file) either; that would make no sense. The protection is there, I assume, to prevent (or hinder) people from obtaining (bying) one copy and then sharing it unencrypted, without charge (that the original seller would receive), all around the world. I could be wrong but re-check the policies/licence agreement of the firm where you buy the things: I'm pretty sure they mention there that they are not responsible for you having a device that supports pdf encryption, but that it is your responsibility to make sure you have such a device (and that you are not allowed to circumvent the encryption in other ways than typing in the keys you have). This means that they sell you an encrypted pdf, and when you buy it, you accept that it is encrypted and that you have to have a device that can unencrypt it for reading. You may be breaking some laws, depending on your country, if you crack open an encrypted pdf, even if it was for your personal use only.

Easiest solution would probably be to simply sell your e-reader and buy another one that supports encrypted documents as well. Especially if you pay for the things, and you pay for them often.

There is a problem with your post that in my eyes makes it unsolvable here. Even if we know that you have legally bought that content and that you are not pirating it it will be against the rules to post here how to break that copy-protection. So I think that b0uncer's solution to get a new reader is the best we can give you.

Or update its firmware, if that's an option. I am not familiar with those devices.

I'm afraid that the removal of copyright protection measures
is illegal in most countries I'm aware of, and that makes this
thread to be against the LQ rules. Closed.