Excel files

[walterkalb]

Some program for someone else's stupidity was set on the table. After deleting this program, Excel files and folders which were on the desktop, among which was a very important Excel documents were damaged all. Help to solve the problem of recover that data quickly, please.

 

[RoryA]

What program was deleted? Deleting a program would not affect Excel workbooks' structure, although running the program might.

 

[walterkalb]

I installed some program to download videos from YouTube. with it installed any additional apps, browser some. and started to open casino pages in a browser, and pornographic advertising. antivirus scanned the computer and put all the infected files in quarantine. I decided to remove this program, because I think that in it problem. but now the problem is with Excel files.

 

[RoryA]

What exactly is the problem with opening the Excel files? Do you get an error? If so, what does it say?

 

[walterkalb]

I get msg"Excel cannot open the file 'xxx.xlsx' because the file format for the file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file."

 

[RoryA]

Have you tried using the Open and Repair option?

 

[Macropod]

I installed some program to download videos from YouTube. with it installed any additional apps, browser some. and started to open casino pages in a browser, and pornographic advertising. antivirus scanned the computer and put all the infected files in quarantine. I decided to remove this program, because I think that in it problem. but now the problem is with Excel files.

In all likelihood, the program you downloaded, or the browser links it opened, resulted in malware being installed and corrupting your files. A good, updated, antivirus program would have detected this and prevented any damage being done. You should now ensure your system is completely free of the malware, then reload your damaged files from a known good backup.

 

[FDibbins]

A shot in the dark here. 'xlsx files are for excel for excel 2007 and later. If you try to open then in an earlier version of excel, you mey get that message