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Is this download not safe to install?


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8 replies to this topic

#1 skymaster191

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Posted 26 March 2016 - 10:57 PM

I have Windows 7 for system builders. It doesn't contain any MS office software. So I downloaded this free LibreOffice software. I was going to install it today.. The RUN or installer box is labeled with security warning. "This file type can potentially harm your computer. Only run software from publishers you trust." I ran a virus scan of the download and it didn't return anything. Did it give me this message because it is an open source application? Should I not install it? I don't buy Microsoft products anymore.



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#2 saw101

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Posted 26 March 2016 - 11:39 PM

Libre Office is a well respected alternative to MS Office. Have a read here: http://www.lifehacker.co.uk/2015/03/17/microsoft-office-alternatives-top-5-office-apps

 

If downloaded from the official website, you can consider it safe to install. https://www.libreoffice.org/download/libreoffice-fresh/


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#3 Nikhil_CV

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Posted 27 March 2016 - 05:26 AM

The problem may have been caused because it was downloaded from internet and Windows has a setting which marks the file so Windows knows ' hey its downloaded from internet' every time the file is executed, causing the warning you saw.

Can you please make sure you saw the UAC warning [ the one which asks whether you need to run the program or not ]which is different from a warning inside the installer window?

You can unblock/remove it flag by going into 'Properties' of the file and clicking 'unblock' under 'General' tab.
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#4 Demonslay335

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Posted 27 March 2016 - 09:37 AM

You can also bypass the warning usually by right-clicking and selecting "Open" or "Run" instead of simply double-click. As long as it was downloaded from the legitimate website, it should be safe. If you have second thoughts, you can upload the installer to VirusTotal for a second opinion.

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#5 Didier Stevens

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Posted 27 March 2016 - 04:12 PM

 "This file type can potentially harm your computer. Only run software from publishers you trust."

 

Where did you download LibreOffice from? This message appears when the installer has no (valid) signature.

However, I downloaded LibreOffice (LibreOffice_5.1.1_Win_x86.msi) and it has a valid digital signature.


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#6 skymaster191

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Posted 27 March 2016 - 08:21 PM

When I right click, the top two options in the tree are INSTALL and REPAIR. It doesn't give me options to open or run.

 

I downloaded from the LibreOffice website. I didn't click on the MAIN NSTALLER button. I scrolled down and downloaded the 64 bit version under OPERATING SYSTEMS.


Edited by skymaster191, 27 March 2016 - 08:30 PM.


#7 Didier Stevens

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Posted 28 March 2016 - 04:51 AM

Can you check the digital signature? Explained here: http://www.bleepingcomputer.com/forums/t/519715/instructional-video-checking-the-digital-signature-of-windows-executables/


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#8 skymaster191

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Posted 04 April 2016 - 11:24 PM

I just viewed Didiers' instructional video on verifying digital signatures. I applied the rules to my LibreOffice download which seems to be ok. I'm going to install it. Coo video. Good job, Didier



#9 Didier Stevens

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Posted 05 April 2016 - 04:17 AM

You're welcome.


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