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Posted on Feb 28, 2009
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Microsoft Office Outlook % 1 is not a valid Win32 application

Recently something must have changed in Outlook as I have always been able to "test" an e-mail attachment before sending to a recipient. Now I constantly get the pop up "Microsoft Office Outlook % 1 is not a valid Win32 application' In order to test the attachment I log on to my e-mail provider, generate the e-mail there then test the attachment which almost always works. I then send the e-mail from the providers site and no longer use Outlook. Is it my imagination or are my Microsoft programs always changing without any of my doing?

  • Anonymous May 11, 2010

    You are using Outlook 2003 or 2007?

×

2 Answers

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  • Microsoft Master 1,997 Answers
  • Posted on Mar 28, 2009
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I/m not sure what you mean by 'testing' an attachment. If you are enabled for automatic updates, there are critical and security fixes to your system that sometimes affect the way things work, but you can also be affected by malware intrusions on your system...
Are you running an up to date antivirus and anti-spyware program? If so, and you are confident that you have a clean system, take a look at the following:
http://support.microsoft.com/kb/258794
This may be the workaround for your problem.
Without more specifics, I'm afraid that's the best I can offer.
I hope this solves your problem. If so, please take a moment to rate this post. Thanks!

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  • Expert 165 Answers
  • Posted on Mar 27, 2009
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This issue can happen if your outlook executable (outlook.exe) is corrupt.

Follow the steps at the link below to resolve the issue.

http://support.microsoft.com/kb/258794

Please ensure that you read all precautions for preventing email loss before you start the process.

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Scanner

Hi

I found the solutiom from microsoft

1. On the Start menu, point to All Programs or Programs, point to Accessories, and then click Windows Explorer. 2. In Windows Explorer, edit the file type. To do this, follow these steps, as appropriate for the version of Windows that you are running: • For Microsoft Windows XP or Microsoft Windows Millennium Edition, follow these steps: a. On the Tools menu, click Folder Options. b. On the File Types tab, click URL:MailTo Protocol under the (NONE) section, and then click Advanced. c. Under Actions, click Open, and then click Edit. d. If you are running Microsoft Outlook 2002, type the following text under Application used to perform action: "C:\Program Files\Microsoft Office\Office10\OUTLOOK.EXE" -c IPM.Note /m "%1"If you are running Microsoft Office Outlook 2003, type the following text under Application used to perform action: "C:\Program Files\Microsoft Office\Office11\OUTLOOK.EXE" -c IPM.Note /m "%1"If you are running Microsoft Office Outlook 2007, type the following text under Application used to perform action: "C:\Program Files\Microsoft Office\Office12\OUTLOOK.EXE" -c IPM.Note /m "%1" e. Click OK two times. • For Microsoft Windows 98, follow these steps: a. On the View menu, click Folder Options. b. On the File Types tab, click URL:MailTo Protocol, and then click Edit. c. Under Actions, click Open, and then click Edit. d. If you are running Microsoft Outlook 2002, type the following text under Application used to perform action: "C:\Program Files\Microsoft Office\Office10\OUTLOOK.EXE" -c IPM.Note /m "%1"If you are running Microsoft Office Outlook 2003, type the following text under Application used to perform action: "C:\Program Files\Microsoft Office\Office11\OUTLOOK.EXE" -c IPM.Note /m "%1" e. Click OK two times. 3. In Internet Explorer, verify the e-mail program. To do this, follow these steps: a. On the Tools menu, click Internet Options. b. On the tab, change the default mail program to Outlook Express in the E-mail box, and then click Apply. c. In the E-mail box, change the default mail program back to Outlook, and then click Apply. d. Close the Internet Options dialog box. e. Click Start, click Run, type mailto:, and then click OK.
you can also visit http://support.microsoft.com/kb/312346

Hope this will solve the problem
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