Does Adobe Reader 9 automatically update to Adobe Reader X

Did you know PDF files can specify initial layout and zoom settings that take effect when you open them? (For example, when you choose the Export to PDF command in OpenOffice, a dialog box lets you specify the initial view and other user interface options that are saved in the PDF file.)

Your problem may be caused by certain PDF files changing the view settings when you open them. In that case, Adobe Reader has accessibility options to ignore the settings specified in PDF files.

I don't have Adobe Reader 9.1.1. But in Adobe Reader 8.2.0, I was able to go to Edit, Preferences, Accessibility, and there's a check box "Always use Page Layout Style" with a drop down box where you can choose "Single Page Continuous".

There's a lot of folk wisdom that Adobe Acrobat Reader requires a reboot because of its Speed Launcher.

This is not, in fact, true. Speed Launcher installs itself in the Windows Explorer "All Users" Startup folder. Thus invoking it after installing it only requires that one log off and then log back on again. Indeed, one could just run the Speed Launcher program directly, from the shortcut in the startup folder, to start it if one wanted to, without even logging off and back on. After all, that's all that's really happening at log on.

Adobe Acrobat Reader requires a reboot because of the download program that it uses as part of installation. This is NOS Micro's getPlus. getPlus installs a "getPlus Helper Service" (running getPlus_HelperSvc.exe) to run on the first reboot after downloading the package that it is being used to install. This helper deletes the getPlus programs from the system, on the grounds that after installation the download manager is no longer needed.

Adobe Updater also sets up things that are run later. Again, however, it does not in fact require a reboot to run them. As one can see from Adobe's description of how to manually unstick Adobe Updater when it fails to complete the process on its own, Adobe Updater installs per-user run commands that are executed at log-on. Thus, again, all that is in fact required is to log off and log back on again, not restart the whole system.