Can't open excel and powerpoint files downloaded

[Deleted]

Hi,

I have problem opening excel and powerpoint files downloaded from the Internet using my Office 2010. Error messages - "file corrupted" (but it can't be that all files are corrupted)?

When I put the files to Skydrive and open it using Office Web Apps, they can be opened. Then, (sometimes) the files in the Skydrive folder in my PC can be opened. Some kind of conversion must have been done by the Web Apps. I don't know what happened.

Any idea?

Please help.

Thanks!

I didn't find the right solution from the Internet.

References  answers.microsoft.com/en-us/office/forum/office_2010-office_install/cant-open-excel-and-powerpoint-files-downloaded/7db4f743-9d31-4c54-bb14-003e47978872

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