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3 Deselect any items that were previously disabled (items that you wrote down in Step 3 of either TechNote kb404984
or TechNote kb404913).
4 Click OK, and restart your computer for the changes to take effect.
If the issue no longer occurs after you have disabled startup items and services, then one of the startup items or services
is the cause.
To identify the specific startup item or service that is causing the issue:
1 Open the System Configuration utility by doing one of the following:
• Windows XP: Chose Start > Run, type msconfig in the Open text box, and press Enter.
• Windows Vista: Click Start, type msconfig in the Start Search text box, and press Enter.
2 Re-enable approximately half of the items that were disabled.
3 Click OK, and then restart your computer for the changes to take effect.
4 Attempt to replicate the issue in Acrobat. Then do one of the following:
• If the issue recurs, then open the System Configuration utility and disable half of the most recently enabled item m s.
• If the issue does not recur, then open the System Configuration utility and re-enable half of the remaining item m s.
5 Go back to Step 3, and continue dividing the items into halves until you have determined which startup item or
service is causing the issue.
6 Once you have isolated the problematic startup item or service, contact its manufacturer for information about
available updates, or leave it disabled.
Solution 3: Troubleshoot Acrobat plug-ins.
Crashes that are accompanied by an NTDLL.DLL error may be caused by a damaged Acrobat plug-in or an
incompatible third-party plug-in.
To determine if a plug-in is the cause, hold down the Shift key while you start Acrobat. Doing so will disable all plug-
ins. Release the Shift key when the Acrobat workspace appears, and then try to recreate the issue.
If the issue recurs when plug-ins are disabled, then plug-ins are not the cause, and you can re-enable plug-ins. Close
Acrobat, reopen it normally, and then go to the other solutions in this document.
If the issue does not recur when plug-ins are disabled, then identify and address conflicting plug-ins by following the
instructions below.
Note: These instructions refer to the Acrobat 9 plug-ins folder. The default location for this folder is C:\Program
Files\Adobe\Acrobat 9.0\Acrobat\plug_ins. However, if you installed Acrobat to a location other than the default
location of C:\Program Files\Adobe\Acrobat 9.0, then modify this path for your custom location.
1 Close Acrobat, and then do one of the following:
• If you have one or more third-party plug-ins, then go to Step 2.
• If you do not have any third-party plug-ins, then go to Step 6.
2 Create a new folder on the Desktop. Move all of your third-party plug-ins out of the Acrobat plug-ins folder and into
the new folder.
3 Open Acrobat and try to reproduce the issue. Then do one of the following:
• If the issue does not recur, then go to Step 4.
• If the issue recurs, then a third-party plug-in is not the cause. Leave the third-party plug-ins out of the Acrobat
plug-ins folder and go to Step 6.
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4 Close Acrobat, and then move one third-party plug-in back into the Acrobat plug-ins folder.
5 Open Acrobat and try to reproduce the issue. Then do one of the Following:
• If the issue does not recur, then go back to Step 4.
• If the issue recurs, then the plug-in that you most recently re-enabled is the cause. Stop here, and contact the
developer of that plug-in for information about available updates, or leave that plug-in disabled.
6 Create a new folder on the Desktop. Move all of the plug-ins from the Acrobat plug-ins folder into the new folder.
7 Open Acrobat and choose Help > Repair Acrobat Installation. Follow the on-screen instructions to repair Acrobat.
(The repair process will create new copies of all of the standard plug-ins that ship with Acrobat.)
8 When the repair process has finished, open Acrobat. The issue should no longer occur. You may delete the folder on
the Desktop that you created in Step 6. If you have any third-party plug-ins, then close Acrobat and move your third-
party plug-ins back into the Acrobat plug-ins folder.
Solution 4: Update device drivers.
Crashes that are accompanied by an NTDLL.DLL error may be caused by an out of date device driver.
See one of these TechNotes for instructions on making sure that you are using the latest driver for all your devices:
• "Verify that device drivers are compatible with Windows XP" (TechNote kb404864)
• "Verify that device drivers are compatible with Windows Vista" (TechNote kb404887)
Solution 5: Repair and defragment hard drives.
Crashes that are accompanied by an NTDLL.dll error may occur if your hard drive or drives contain damaged sectors
or fragmented files.
See one of these TechNotes for instructions on repairing and defragmenting hard drives:
• "Repair and defragment hard disks (Windows XP)" (TechNote kb404981)
• "Repair and defragment hard disks (Windows Vista)" (TechNote kb405363)
Solution 6: Repair your installation of Windows.
Repair your installation of Windows to restore critical system files, including NTDLL.DLL.
For instructions on repairing an installation of Windows XP, see "How to perform an in-place upgrade (reinstallation)
of Windows XP" (Article 315341) on the Microsoft Help and Support site at http://support.microsoft.com.
For instructions on repairing an installation of Windows Vista, see "How to repair the operating system and how to
restore the operating system configuration to an earlier point in time in Windows Vista" (Article 936212) on the
Microsoft Help and Support site at http://support.microsoft.com .
Advanced Troubleshooting
If the solutions above do not resolve the issue, then a problem with your computer's hardware may be causing the issue.
Disclaimer: Adobe doesn't support hardware and provides these tasks as a courtesy only. For further assistance, contact
the hardware manufacturer or an authorized reseller. If you troubleshoot hardware problems yourself, then you may
void the warranty for your computer.
Note: Before you remove or rearrange hardware, turn off and disconnect the power to the computer and any peripheral
devices.
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Solution 7: Check for SCSI problems.
See one of these TechNotes for details:
• "Check for SCSI problems (Windows XP)" (TechNote kb404868)
• "Check for SCSI problems (Windows Vista)" (TechNote kb404916)
Solution 8: Check for problems with RAM DIMMs.
See "Check for problems with RAM DIMMs" (TechNote kb404980) for details.
Download Acrobat products | 9, 8
Thank you for purchasing Adobe Acrobat! Installing your Acrobat product is quick and easy. If you purchased Acrobat
9 Professional, Acrobat 9 Standard, or Acrobat 8 Professional and no longer have the installation media, you can
download replacement installers from this page.
The installation files on this page are for Acrobat 9 Professional, Acrobat 9 Standard, and Acrobat 8 Professional retail
licenses. If you have a volume license, visit https://licensing.adobe.com.
Warning: To safeguard your system against malicious attacks through PDF files, we highly recommend that you run
the latest versions of Acrobat and Reader. Adobe no longer provides security updates or patches for these older versions
of Acrobat.
Read before you download Acrobat 9 Professional, Acrobat 9 Standard, or Acrobat 8 Professional
• You need your Acrobat serial number to complete the installation. To find your serial number, sign in to your Adobe
account. On the Manage Accounts page that appears, all your registered products and their serial numbers are listed
in the Plans & Products section. For more information on locating serial numbers, or on registering a serial number,
see Find a serial number.
• Make sure that your system meets the requirements for Acrobat products. Older versions of Acrobat may not run
properly on a newer operating system.
• After downloading the installation files, see these instructions to extract the files and install your product.
• Having trouble? Get help from our community experts.
Download Acrobat 9 Professional, Acrobat 9 Standard, or Acrobat 8 Professional
How long does it take to download a product?
• Acrobat 9 Standard
• Acrobat 9 Professional
Languages
Mac OS X
Windows
English – International
English – Universal
French
French – Canada
German
Not available
File 1 of 1 (317 MB)
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• Acrobat 8 Professional
Acrobat 8, 9, or 10.x continuously remounts review
servers | Mac OS
Issue
Your Mac OS system continues to remount a review server after you participate in a server-based PDF review with
Adobe Acrobat.
Solutions
Languages
Mac OS X
Windows
English—International
English—Universal
French
French—Canada
German
File 1 of 1 (508 MB)
File 1 of 1 (327 MB)
Japanese
Not available
File 1 of 1 (313 MB)
Languages
Mac OS X
Windows
English—International
English—Universal
French
French—Canada
German
Not available
File 1 of 1 (254 MB)
Japanese
Not available
File 1 of 1 (256 MB)
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Solution 1: Remove the review that is associated with the server that is being mounted.
1 Choose Comments > Track Reviews.
2 In the Tracker window, remove the review that is associated with the server that is mounting.
3 Close the Tracker window.
Solution 2: Remove the Synchronizer directory.
Warning: Removing the Synchronizer folder removes all Shared Reviews from your Tracker.
• For Acrobat 8, remove the following directory: Macintosh HD/Users/[user name]/Library/Acrobat User Data/[8.0
or8.0_x86]/Synchronizer/
• For Acrobat 9, remove the following directory: Macintosh HD/Users/[user name]/Library/Application
Support/Adobe/Acrobat/[9.0 or 9.0_x86]/Synchronizer/
• For Acrobat 10, remove the following directory: Macintosh HD/Users/[user name]/Library/Application
Support/Adobe/Acrobat/10.0/Synchronizer/
Accessible PDF files created with MS Office 2007
products cause Acrobat and Reader to freeze
Issue
Accessible PDF files created with PDFMaker via Office 2007 products have poor performance. When you open these
files using either Acrobat or Reader on a machine with JAWS 9, 10, or 11, the application stops responding. Also, CPU
usage jumps to 100% and stays there for more than minute. This behavior is consistent irrespective of the document's
size.
Solution
1 Choose Edit > Preferences > Reading.
2 In the Screen Reader Options panel, set one of the following:
• Set the "Minimum number of pages in a large document" option to 10 or fewer.
• In the Page vs. Document, select "For large documents, only read the currently visible pages".
Both options allow the application to render few pages at a time, which bypasses the performance issue.
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2D Graphics Acceleration (GPU) support in Acrobat and
Adobe Reader (9.0 on Windows)
What's covered
• 2D Graphics Acceleration Preference
• Supported Video Cards
Adobe Acrobat and Adobe Reader 9 introduce continued support for 2D graphics acceleration (also referred to as GPU
-graphical processing unit). This feature enhances page display, zooming, and panning within two dimensional PDF
files. Acrobat or Adobe Reader detect the properties of your acceleration hardware and enable acceleration for
supported configurations.
2D Graphics Acceleration Preference
If acceleration hardware is detected, then optimization is enabled for all files except the first one opened when Acrobat
launches. To verify that Acrobat has detected your acceleration hardware, choose Preferences from the Edit menu,
select Page Display and verify whether an option labeled "2D graphics acceleration" is available under the Rendering
section.
If Acrobat or Adobe Reader does not detect a supported video card, then the preference will not be visible.
Supported Video Cards
The detection technology within Acrobat or Adobe Reader 9.0 supports nVidia, ATI and Intel Shader Model 2 and
Shader Model 3 video cards with 128 megabytes of VRAM mini mum. The following video cards have been tested with
Acrobat and Adobe Reader 9.0.
If your video card is not in the list above, but does support Shader model 2 and 3 and has at least 128 megabytes of
VRAM, Acrobat will most likely detect this and enable 2D Graphics Acceleration Preference.
Acrobat and Adobe Reader 9.0
nVidia Video Cards For Desktops
Quadro FX 330 PCIe Quadro FX 500 AGP Quadro FX 1300 PCIe GeForce
6600 AGP GeForce 6600 PCIe GeForce 6800 PCIe GeForce 7300 PCIe
GeForce 7600 PCIe GeForce 7800 PCIe GeForce 7900 PCIe GeForce
8800 GTX Quadro FX 370 PCIe Quadro FX 570 PCIe Quadro FX 1400
PCIe Quadro FX 1700 PCIe Quadro FX 3500 PCIe Quadro FX 3700 PCIe
Quadro FX 4500 PCIe Quadro FX 4600 PCIe
Quadro FX 4800 PCIe
ATI Video Cards For Desktops
Radeon X300 PCIe Radeon X850 XT/PE PCIe Radeon X1050 PCIe FireGL
T2 FireGL V3100 PCIe FireGL V3300 PCIe FireGL V3400 PCIe FireGL
V5200 PCIe FireGL V7200 PCIe FireGL V7300 PCIe FireGL V7350 PCIe
FirePro V7750 (FireGL) Radeon x1300 PCIe Radeon x1600 PCIe Radeon
x1800 PCIe Radeon x1900 PCIe Radeon x1950 PCIe Radeon x1800 All-
in-Wonder PCIe Radeon HD 2400 PRO Radeon HD 2600 XT Radeon HD
2900 XT Radeon HD 3850 CrossFire System Configuration
Intel Chipsets for Desktops
Intel Q965 Chipset
nVidia Video Cards for Laptops
GeForce 8700M GT SLI System Configuration GeForce Go 7900 GTX on
Dell XPS
ATI Video Cards for Laptops
Mobility Radeon X1400 on Dell Inspiron Mobility FireGL V5200 on IBM
T60P
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