Clear Print Queue in Windows 7/Vista

If you have a long list of hung print jobs in Windows 7 or Vista, you can clear the print queue easily by using these steps.

1. Click Start.

2. Type Command.

3. Right-click Command Prompt and select Run as administrator.

4. Type net stop spooler then press Enter.

5. Type del %systemroot%\System32\spool\printers\* /Q then press Enter.

6. Type net start spooler then press Enter.

The print queue on your Windows 7/Vista system should now be cleared. Type exit and press Enter to exit the command window.

From: http://www.technipages.com/windows-7vista-clear-print-queue.html

Adobe Acrobat Reader plugin stalls when loading PDF

Issue:

When using Adobe Reader web browser plug-in for Internet Explorer, Firefox, Safari, Chrome or other browser to load a PDF document hosted under IIS (Internet Information Services) 7.5 web server, the PDF document does not load properly or the browser appears to be hanging while loading the document. The browser may stall or display the error message, "a file i/o error has occurred." This behavior is not consistent; other PDF documents serve with no problems.

Note: This issue occurs because IIS 7.5 web server coalesces merged byte-range requests into a single byte-range request. The response generated for such requests is not handled correctly by the Adobe Reader web browser plug-in.

The same issue exists in the Firefox web browser. Firefox is designed to detangle the response and send it to the Adobe Firefox plug-in (which is different from the one in Internet Explorer), but it drops the response as well, resulting in the same behaviors.

The Adobe Reader Safari plug-in shares the same issue.

Solution:

http://kb2.adobe.com/cps/807/cpsid_80780.html