Error "windows cannot open this file. to open this file, windows needs to know what program you want to use to open it"appears just after the start on its own.

After that I typed my password at startup, windows can not open this file. to open this file, windows needs to know what program you want to use to open it.  At this point, I have no one based on nothing and and messages appear literally on its own. I think it's done my computer very slow also.

What can I do to fix this?

It's a site file

Hi Jose7777777,

  • What version of Windows are you using?
  • How long have you been faced with this problem?
  • Did you do changes on the computer before the show?

Follow the suggestions below for a possible solution:

Step 1: Start in safe mode and check if the problem persists.

Start your computer in safe mode

http://Windows.Microsoft.com/en-us/Windows7/start-your-computer-in-safe-mode

Step 2: If the problem does not occur in safe mode, you can put your system to boot (in normal mode) to solve the problem.

How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7

http://support.Microsoft.com/kb/929135

Note: After troubleshooting, be sure to set the computer to start as usual as mentioned in step 7 in the above article.

You can also view the startup folder.

I hope this helps.

Tags: Windows

Similar Questions

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    Original title: I can't open any programs.

    Today, I tried to free up space for some games, I tried to download. In the Remove Programs process I must have learned something really important. Now, all of the icons on the desktop are white and I can't open anything. None of the programs, folders, files, photos. The pop up according to open this file, windows needs to know what program to use. It does give me an option to choose a program and I can't open my internet browser unless I have to go through some point average round through my control panel. If there is a way to solve this problem, it would be really useful. I think that the computer uses Windows Xp.Thank you

    Hello

    Method 1
    Follow the steps in the article to fix your .exe file.

    Cannot open files with extensions such as.exe, .com, and.lnk on a Windows XP-based computer
    http://support.Microsoft.com/kb/923077

    Important: This section, method, or task contains steps that tell you how to modify the registry. However, serious problems can occur if you modify the registry incorrectly. Therefore, make sure that you proceed with caution. For added protection, back up the registry before you edit it. Then you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article: http://support.microsoft.com/kb/322756

    Method 2
    I suggest you run virus scan online by using the Microsoft safety scanner.

    Microsoft safety scanner
    http://www.Microsoft.com/security/scanner/en-us/default.aspx

    Note: when you do an antivirus online, you will lose data that are affected by the virus. Microsoft is not responsible for the loss of this data.

    Method 3
    I suggest you try the steps from the following link:

    How to change or choose the program that starts when you double-click a file in Windows XP

    http://support.Microsoft.com/kb/307859

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    If you still have problems, check in a new user account

    How to copy data from a corrupted to a new profile in Windows XP user profile
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  • Cannot open file because Windows needs to know what program created the file

    After downloading some files when I try to open the file, I get the message cannot open the file, windows needs to know what program created the file.

    Any suggestions?

    Perhaps no program has been assigned to this file format and so you cannot open these files.
    I put t know which files you downloaded, but you can choose an application installed that can open these files.

    Right click the file and I have to then choose open with.
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    Thanks, Dan

    Hello

    (1) do you have made no changes before this problem?

    (2) what operating system do you use?

    Method 1:

    Step 1: I suggest you perform a clean boot before run us the fix it.

    Clean boot

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    http://support.Microsoft.com/kb/929135

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    Method 2:

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    http://Windows.Microsoft.com/en-us/Windows7/start-your-computer-in-safe-mode

    Step 2: Microsoft Safety Scanner

    http://www.Microsoft.com/security/scanner/en-us/default.aspx

    Note: The data files that are infected must be cleaned only by removing the file completely, which means that there is a risk of data loss.

    Let us know the results.

  • Application not found error-choose the program you want to use to open this file

    Soon all the world.

    I really hope that someone will post a reply to my question as soon as possible. I will try to be as descriptive as I could possibly, in order to solve my problems.

    The main problem is that I can't open some, if all the program files, applications on my windows 7, 32-bit laptop. I'm constantnly get application not found error, showing in a small window address, I was trying to do. Whenever I want to open a program, like the Adobe reader, word of microsoft, excel, mozilla firefox, google chrome - basically everthing, a window opens and is telling me this: choose the program you want to use to open this file: file: acad.exe... and recommend me acrobat from adobe program, any program I was trying to enter (in this case autoCAD).

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    Original title: Windows 7 - Application not found. A big problem or easy-peasy?

    Hello

    Thanks for posting your query in Microsoft Community.

    1. What is the complete error message you get when opening a file?
    2. What happens when you try to open the command prompt?
    3. What happens when you try to access the internet by using Internet Explorer?
    4. You did changes to the computer before the show?

    According to the description of problem errors you get "application not found error" and "choose the program you want to use to open this file" and not being is not able to do system restore, it seems that some windows file is corrupted. I also suggest you to post back the results of analysis.

    I would suggest trying the following methods and check if this is useful:

    Method 1:  Run SFC scan and check for corrupted Windows files and violations of integrity.

    Use the System File Checker tool to repair missing or corrupted system files

    http://support.Microsoft.com/kb/929833

    Method 2:

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    Original title:

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