Excel Cannot Open File - Format Or Extension Is Not Valid?
Jul 21, 2014
I am running Excel 2007 and have been working on files and ONLY saving them to my USB memory stick.
On connecting the device to my PC (using an extension USB cord) I noticed a very brief minute blue like spark, and didn'y release until I tried to access my files that the entire content was wiped.
Excel cannot open the file 'LostFile_XLSX_608879.xlsx' because the file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.
Well I think it looks fine to me, and I endeavoureed to use the Open & Repair when openng the file too, with no luck.
Installed Office Professional Plus 2010 on new computer with Windows 8. Can create and open all Office documents except unable to open existing Excel documents. When try to open, I am asked for the activation key. When key is entered, get message that key is not valid. Inserted install disk and re-entered activation key. Did not work.
I have numerous hard drives and over the years due to bad housekeeping I have files all over the place, I am trying to tidy things up by transferring all files with the same extension onto a large memory stick so I can then transfer them back into specific folder, is there a program that will do this.
I have third party software that uses text files that have an extension of .mc. The originally were not set to open with any program. I accidentally set it so that a program called N1MM is now set to be the default.
How do I restore the register so that .mc files are not associated with any program?
Some file types appear in File Explorer with the file name extension and others do not. For example in this folder the .DLL file has the extension shown but not the .EXE files. What setting is responsible for this and how would I get more consistent behaviour?
How can I view a PDF file and an Excel file on the screen at the same same time? Every time I open a PDF file, everything shuts down, excel for the PDF. Whenever I click off the PFD, I see everything else, but the PDF is gone. I'm trying to get some info from the PDF to Excel, but it's really hard to do this in Widows 8. In Windows 7 and previous versions, I could see more than one thing on my screen at the same time. Now, the PDF simply takes over control of everything else, so you see the PDF and that's it and that's all.
I have a Sony Vaio Pro 13 laptop, running Windows 8.1. If I have a couple of Excel spreadsheets open, close the laptop lid, leave it a minute or so, then re-open the lid, the screen momentarily goes dark, then comes to life again. All open apps are OK with the exception of the Excel sheets. In these, all the cells (& ribbon) are unviewable. The whole worksheet area on the screen is not the normal cells but a screen full of whatever colour I set for the default ribbon colour (some kind of beigy grey...). You can't click on any of the cells, can't see what's in them etc... you CAN close the sheet using the window close x at top right (even though you can't actually see the x) but that's all.
I have set up Windows so that NO ACTION is taken on closing the lid. It seems to be the same problem as described at hibernate - Excel windows invisible when laptop comes back from sleep - Super User but no working solution is available. (The one on this link refers to clicking 'restore' but that doesn't work) Running Excel 2013 (part of Office 2013).
I'm stuck as to what may be causing this... but I guess it should be an Excel problem since other apps (e.g. Word) don't exhibit this problem, but that may be a function of what's open at the time the lid is closed / re-opened?
I'd like to add a file extension to the list given in Control Panel/Default Programs. In WinXP it was really easy but I hardly needed to use it as there seemed to be a lot more extensions available anyway back then. Unbelievably, (well, to me anyway), MS seem to have omitted '.flac'. How do I go about it?
Some programs are becoming slow to load or do not recognize their connection to a file extension. Most noticeable are Nitro PDF Professional which doesn't always start when I click on a PDF file, sometimes it does, some times it doesn't. Quicken is often slow to start, some times the window opens then it waits for the display, sometimes the there is a wait until the window even opens. Same for xplorer2 opening and even selecting another folder. Going back to Windows 7 with almost the identical installed programs/utilities (about 40) the "problem" goes away.
I transferred many music files from a backup drive onto a new laptop running Windows 8, and found most renamed as numbered files with a .ptl extension. Found out that my backup drive (Seagate FreeAgent GoFlex) doesn't like long filenames and renames them as referenced above. ("ptl" stands for "path too long"). I have been renaming them, dumping the ptl extension to get the files back as mp3's, but I get a confirmation window that I have to click "yes" to for each and every change I attempt. I'd love to kill the confirm popup for every file I change, it doubles the time involved for each file and I have enough work just renaming the files back to their original names. I've looked all over the control panel for something to uncheck to accomplish this, with no success.
I got this msg tryng to refresh my pc . because my vaio gate app wasnt working right . so after the restar i just got the blue screen with this error the boot configutating data file dosent have valid infomation of an operating system.
How to make the 'Libraries' folder structure appear when doing a file open file save. In both case I can see the folders labeled Desktop, Documents, Downloads, etc. but I cannot see the Libraries folder.
I created a vhd file and cant put it in the recycle bin because every time I try it says Cant open file because it is open in System, I try again but it doesn't work. I've just lost 400gb of disk space!
I have a program that used to run on win 7, but 8 wont let me open the file. I've tried the Program Compatibility Troubleshooter with no luck. After I select an O.S., it asks me to test the program. I click the option and it does nothing.
in Windows-8 when i try to delete folder i got the message: "The action cant be completed because the folder or file in it is open in another program" i check and close all program, i dont see it in the task-manager (if i reset the computer, and try again it will delete it)
another problem in Windows-8, when i copy, or delete folder - i cant see the action until i press F5 for refresh
Running Windows 8 Pro x64 as a Domain User with full Admin privileges, I am unable to use File History. I cannot open/start the File History tool. When I attempt to click on it from the Control Panel, nothing happens. When I try running it from the Metro search tool, it switches to the desktop and nothing loads. I've also tried in the Action Center, under Maintenance, "File History is Off. Turn On." Clicking "Turn On" does nothing.
All other items under the Control Panel that I have tried open and work with no problems.
I also tried in a "clean boot". System file checker reported no errors.
I just noticed in Control Panel there is "Windows 7 File Recovery". If I launch that and try to set up a Windows 7-style backup, it seems to work. I suppose I could just use this older tool instead of the new File History, although I haven't researched the differences.
I have another machine with the same version of Windows 8, and I am able to launch File History with no problems. I click File History from control panel and am taken to another screen that allows me to enable it. No such screen on the problem machine. The only main difference is the working machine is a regular user account; whereas, the non working machine is a domain account
How do you want to open this type of file (.psd)?I'm choosing more options and picking photoshop as the default app, but nothing is happening. The same things happens to .torrent files, only works if i have the program open and drags the file into the program.
Files it happens with: .psd .torrent .mobi And the files are blank.
in Windows-8 when i try to delete folder i got the message:
"The action cant be completed because the folder or file in it is open in another program"
i check and close all program, i dont see it in the task-manager(if i reset the computer, and try again it will delete it) Windows-8, when i copy, or delete folder - i cant see the action until i press F5 for refresh