Hi there.
I have scanned my external HDD with Avast Free Antivirus.
Scan #1 detection: DarkBasicOnlineFree.exe
I have followed up the automatic procedure as suggested by Avast.
Scan #2 and #3: Nero Backit Up_burn was detected [42110], described as decompression bomb, unable to scan.
How to proceed to get this issue solved?
I shall be looking forward to hearing from you at your earliest convenience, thanks.
Best regards, Hermie
Thanks Pondus for your reply.
Unfortunately file exceeds max file size at both metascan and virus total.
Therefore I’m unable to upload and scan.
Kind regards, Hermie
Main issue with a file marked as a ‘compression bomb’ in the past was that, in older obsolete systems, the file could expand itself beyond the size of the hard drive free space and/or system memory and result in a system freeze or crash. Included with that was the risk of corruption of system files.
The warning given is not malicious per se, but given today’s hard drives are ranging up to 4 TB’s in size, the potential issue today is not what it would’ve been as few as ten years ago if such a file were opened now.
Really a warning to caution an user over opening such a file in the first place more than anything else. Pondus’ link hints at that.
Thanks mchain. The file is located at a 1TB external HDD. What to do next? Remove the file?
Best, Hermie
Remove the file?Do you use it?
File is not malicious, just a big highly compressed file that avast will not unpack and scan
you may right click and scan it with Malwarebytes
Thanks Pondus for your reply.
No, I don’t use it.
Right click scan with mbam is not available at my pc [mm, strange].
Details of setup folder:
filename before: 7zS.sfx
size: 347 MB
copyright: 2007 Nero AG
version: 4.42.0.0
product description: Nero Installation
signature: sha1
Looking forward hearing from you, thanks in advance.
Best regards, Hermie
Right click scan with mbam is not available at my pc [mm, strange].see / click screenshot below
Hi Pondus, done!
No detection by mbam!
Best regards, Hermie
If it’s not used, why have it ??? Get rid of it. ! 
Thanks Bob3160, I got rid of Nero.
Then I scanned with mbam: zero detection! I felt happy.
Then I scanned wit Avast: unable to scan recycle.bin.
Can I delete/remove this file?
Can a special program maybe fix it.
Best regards, Hermie
Can a special program maybe fix it.fix what?
Hi Pondus. Fix the Avast/recycle.bin issue. Or is there no need to fix? Why does Avast have a “problem” scanning all files whereas mbam does not.
Kind regards, Hermie
there may be a default setting that avast dont scan the recycle bin
just right click recycle bin and empty, then they are gone to file heaven 
Why does Avast have a "problem" scanning all files whereas mbam does not.what do you mean by all files?
Thanks Pondus.
It seems that my pc behaves normal so far.
I haven’t found the default setting which enables Avast to scan all data stored on my external HDD.
Enjoy your weekend, best, Hermie
I haven't found the default setting which enables Avast to scan all data stored on my external HDD.I meant that recycle bin may be default excluded from scan
You don’t need to scan all data and there is always some files that can’t be scanned for whatever reason >> https://blog.avast.com/2014/02/28/how-do-i-handle-files-that-avast-cant-scan/
Thanks Pondus for your reply and link.
I wanna say thanks to everyone involved here for their great help.
Best regards, Hermie
Hermie,
A word of caution about keeping a system clean(er): http://antivirus.about.com/b/2007/03/11/clean-quarantine-or-delete.htm
Also, consider what happens when a system file is deleted (in this case Recycle Bin) where would you put your files you want to remove at a later time?
In some cases, removal of something as simple as Notepad (which is a system file) may require a complete re-install of the operating system to get it back.
“If it ain’t broke, don’t fix it.”
Thank you mchain for the weblink, I found the article interesting reading.
It’s hard to keep a windows machine clean and up to date.
Time consuming too, therefore I switch over to my chromebook so now and then.
Best regards, Hermie
Since there’s no protection on the Chromebook, you’ll never know if you stumble upon an infection.
I guess that makes it OK ??? ??? ???