Hi, i cannot open PDF files. I recently downloaded a sample of Adobe Pro, but that has now expired

Hi, i cannot open PDF files. I recently downloaded a sample of Adobe Pro, but that has now expired and my PC wants a code input to enable me to open adobe files.
I do not wish to purchase Adobe Pro as it is too expensive.
please help, being unable to open PDF files is starting to hamper my business.
thanks

If all that you want to do is open PDF files, you can download Adobe Reader from http://get.adobe.com/reader/

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Start Adobe Acrobat, use the menu File > Open... and select a PDF file. What happens now?

I cannot open PDF files

Hallo,
I cannot open PDF files.
I download them, when I try to open, the message with damaged file and cannot be repared appears on my screen.I did delete and install Adobe Reader, but I have the same problem.
Can anyone help?

Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
While logged in as Guest, you won’t have access to any of your personal files or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
Test while logged in as Guest. Same problem?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.
Step 2
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login, or by a peripheral device.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of steps 1 and 2.

New problem for me cannot open pdf file on my computer

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What is your operating system? Reader version?
What exactly means "cannot"?

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That crash is a known bug in Apple's display code.
But it's the QuickDraw code, which Apple does not want to fix.
There is nothing we can do about that OS bug, other than to suggest using a more recent version of Photoshop written to the Cocoa APIs.

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Firefox automatically upgrades the version I am using. Since it was recently upgraded I cannot open pdf files. Am faced with a blank page. I went through some of the suggestions on these pages and when I opened the Tools window, there is a warning:
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Is there a way around it? Or is it time to say goodbye to Firefox and move to Safari?

When Firefox updates, it turns
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knowledge (third party add-
ons) have been disabled. For
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http://support.mozilla.org/en-US/kb/Add-ons%20are%20disabled%20after%20updating%20Firefox#os=android&browser=m10

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Newer Reader versions are more strict than older versions (and other PDF viewers). If certain minimum requirements are not met, Reader will tell you that the PDF is damaged. This can happen when a document was created with software that does not adhere to PDF standards, or when the file was damaged during a download or email transmission.
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Hello,
I searched this site and google for this error terminology and come up dry. I support a user who has been for years using Acrobat 5 (yes, I know...) to read files in a client DB program, as well as other PDF files on their PC. In the last week or so, they have started gatting this error "Acrobat is being used by another application and cannot open PDF files until the other application is closed." any time they attempt to open a PDF file attached to an email (via Outlook).
It is my understanding that they cannot upgrade to a newer version of Acrobat because of limitations of their client software, but had not previously had any issues viewing PDF notes from the DB, and PDF attachments in their email.
I have tried uninstalling and re-installing, as well as tried using Adobe Reader 7 & 9 in conjunction with Acrobat to try to get around this issue, but have not been successful.
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Thanks,
Jesse

I don't have an answer to your technical problem. The product I assume is Acrobat that you are talking about (based on the post title), Adobe is the company name. This is a good place to ask questions on Acrobat if folks can figure out what you are talking about. They will ask for the product version number (like AA9.3.3), operating system, and other applications if appropriate. Also, just what you are doing that generates the message.
As for Adobe, you are not likely to get an answer from them here in the user forum. You will be lucky if you can get an answer if you can contact them and not be on hold for more than an hour (sorry, this is why a lot of folks end up in the forum).
So, to help others try to answer your question, what are the products and versions involved? What OS? What are you doing when the message comes up.

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cannot open PDF files in safari. It tells me first character is invalid - I have deleted plug-ins and reinstalled the program.

HI..
If you are using Adobe Reader ...
Try uninstalling the current copy of Adobe Reader first.
Best to use a utility to do this to make sure all the associated files are removed as well > Download AppCleaner for Mac - Uninstall your apps easily. MacUpdate.com
Then reinstall > http://get.adobe.com/reader/
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What I can do, is to click on the button next to the awesome bar and set that plug-ins will always load automatically for this page. Then the pdf file loads.
Another work around is to copy the link and paste it in IE.
Is this a bug with "click-to-play"?

Thanks cor-el. I have read the various bug reports and it is indeed the same. Has been known for a while...
Anyway, I find no mention of the work-around: "Click on the button next to the awesome bar and set that plug-ins will always load automatically for this page."
I don't know if there is a place to give that feedback.

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Thanks for the help.

Hello,
Have you tried, to start Firefox in safemode you can do so by following these steps
'''If Firefox is open,''' you can restart in Firefox Safe Mode from the Help menu:
* Click the menu button [[Image:New Fx Menu]], click Help [[Image:Help-29]] and select ''Restart with Add-ons Disabled''.
'''If Firefox is not running,''' you can start Firefox in Safe Mode as follows:
* On Windows: Hold the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* On Mac: Hold the '''option''' key while starting Firefox.
* On Linux: Quit Firefox, go to your Terminal and run ''firefox -safe-mode'' <br>(you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
When the Firefox Safe Mode window appears, select "Start in Safe Mode".
;[[Image:SafeMode-Fx35]]
'''''If the issue is not present in Firefox Safe Mode''''', your problem is probably caused by an extension, theme, or hardware acceleration. Please follow the steps in the [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]] article to find the cause.
''To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
When you figure out what's causing your issues, please let us know. It might help others with the same problem.

Cannot open pdf files

I cannot open pdf files from the internet. I just get a small white cross in a black background in the top left hand corner of the screen. This is not just from one website but happens with all. Advice please. I am using Windows 7 Home Premium and Internet Explorer as the browser and have the latest Adobe.

Richvan2, welcome to the forum.
The first thing you should do is run your antivirus program. It could be a virus.
Then, you should download the latest version of Adobe Reader. It may be a glitch in the current version on your computer.
Please click the "Thumbs up + button" if I have helped you and click "Accept as Solution" if your problem is solved.
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Hi, i cannot open PDF files. I recently downloaded a sample of Adobe Pro, but that has now expired

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