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If you can't open the file, re-read the extension and research it online. In actuality, the file I downloaded was setting up Office 2013. In Value data box, type 0 Zero and click OK.

This behavior likely would extend to office 2007 and Office 2010. Has anyone seen this before? A detailed analysis of affected files submitted to Microsoft for investigation has revealed the files are encrypted with a private and public key.

Fix Excel Cannot Open the File Because The Extension Is Not Valid

I just installed Office 2013 over Office 2010 not my intent, but that's another issue. Most things seem to work well, but Excel 2013 won't start when clicking a file or shortcut to a file. I get a message that MICROSOFT EXCEL HAS STOPPED WORKING, trying to recover data, then The weird thing is if I open Excel 2013, and then open the same file, it works fine. Also, holding CONTROL and clicking the Excel exe file, does not start it in safe mode, I get the same error message not working... If I had that problem, and couldn't find someone here to tell me authoritatively what's wrong, my guess would be that Excel 2013 works ok as evidenced by the fact that it's opening documents just fine , but that Windows still has Excel 2010 in its associations. When you get Excel 2013 to open a file, you see, you know that Excel 2013 is doing it. When you double-click on an Excel document in Windows, Windows looks to see what app should open it. But while I think I'm good inside Excel, I get kind of vague when I have to figure out how Excel is interacting with Windows. Don't believe my answer until someone else here agrees with me. Originally Posted by BobBridges: If I had that problem, and couldn't find someone here to tell me authoritatively what's wrong, my guess would be that Excel 2013 works ok as evidenced by the fact that it's opening documents just fine , but that Windows still has Excel 2010 in its associations. When you get Excel 2013 to open a file, you see, you know that Excel 2013 is doing it. When you double-click on an Excel document in Windows, Windows looks to see what app should open it. But while I think I'm good inside Excel, I get kind of vague when I have to figure out how Excel is interacting with Windows. Don't believe my answer until someone else here agrees with me. I too thought perhaps it was a file association issue. Hello CGM3 Computer Generated Man, version 3? Thanx for the reply. I have already tried to change the file association from Excel 2013 back to Excel 2010, but when I browse to Excel. EXE 2010 and click save, there is a video flash on the screen like it's trying to add Excel 2010 to the list and then erases it , and only Excel 2013 is shown. Like so many products these days, I guess Excel 2013 thinks it's the only thing suitable to use, and someone cancels the request for changing the association to an older version. Interestingly, when i try the same procedure with an XLS file, I get the same results. It seems like Microsoft has hardwired something to only allow association with the latest executable. I suspect my only cure is to uninstall all the old stuff and reinstall 2013. I had intended to do that in the first place, thinking that when I was downloading Office 2013 I could install it later. In actuality, the file I downloaded was setting up Office 2013. I have been wanting to purge my computer and do a clean install of everything, and I guess this is as good a reason as any. Originally Posted by MikeyChris: Hello CGM3 Computer Generated Man, version 3? Thanx for the reply. I have already tried to change the file association from Excel 2013 back to Excel 2010, but when I browse to Excel. EXE 2010 and click save, there is a video flash on the screen like it's trying to add Excel 2010 to the list and then erases it , and only Excel 2013 is shown. Like so many products these days, I guess Excel 2013 thinks it's the only thing suitable to use, and someone cancels the request for changing the association to an older version. Interestingly, when i try the same procedure with an XLS file, I get the same results. It seems like Microsoft has hardwired something to only allow association with the latest executable. I suspect my only cure is to uninstall all the old stuff and reinstall 2013. I had intended to do that in the first place, thinking that when I was downloading Office 2013 I could install it later. In actuality, the file I downloaded was setting up Office 2013. I have been wanting to purge my computer and do a clean install of everything, and I guess this is as good a reason as any. There are 2 things I can think of. I know these normally don't work but it's worth a try. The other thing that is kind of concerning is you could have some type of malware in your Excel program that is running the code everytime you run excel that way. You definitly want to do a virus scan and see if anything is found. Originally Posted by excelledsoftware: There are 2 things I can think of. I know these normally don't work but it's worth a try. The other thing that is kind of concerning is you could have some type of malware in your Excel program that is running the code everytime you run excel that way. You definitly want to do a virus scan and see if anything is found. Thanx for the tips. MSE scanned last night with no malware detected, but I will scan with Malewarebyte today as well. As for repairing Excel, I am lost. In 2013 I don't see a help menu maybe I'm looking at it and not seeing it. Also, when I look in Control Panel PROGRAMS there are no Office 2013 programs there 2010 programs are there. Obviously somethings have changes. Does this shed any light on it to you gurus out there? BTW, I have done complete and LONG MSE and Malewarebyte scans and found no malware. All other Office Pro 2013 apps seem to be fine. I know I will eventually uninstall everything and start over, but right now I need access to some files and can't risk being several days withput them. Originally Posted by MikeyChris: Thanx for the tips. MSE scanned last night with no malware detected, but I will scan with Malewarebyte today as well. As for repairing Excel, I am lost. In 2013 I don't see a help menu maybe I'm looking at it and not seeing it. Also, when I look in Control Panel PROGRAMS there are no Office 2013 programs there 2010 programs are there. Obviously somethings have changes. It's good that you have done your scans hopefully you have conducted a malwarebytes scan with the most updated database while computer is in safe mode. Just to be sure. Thanx for reminding me to scan in SAFE mode. I will do that I was not in safe mode when I scanned. There was no difference after the repair. Thanx again for the help.

It may be that Excel did not install to the default folder on your computer because, for example,a previous version of Office or a version of Office document viewer software was already installed. It seems like Microsoft has hardwired something to only allow association with the latest executable. If you find no Excel autosaved files, no previous version when you lost an Excel by deletion, EaseUS is worth to try. Reply with necessary information and I'll be happy to help you further. Can anyone help me fix this problem. We have confirmed that this can also affect PowerPoint files, AutoCAD files and JPEG images. You definitly want to do a virus scan and see if anything is found. Important: If a disk error or network error makes it impossible to open a workbook, move the workbook to a different hard disk drive or from the network to a local disk before you spend time trying any of the following recovery options. With my best regards, Don Muench ABOUT USTechyv is one of the leading solution providers covering different aspects of Computers and Information Technology. Please confirm if your application support.