OK, a few people have cast their eyes over this and it would appear that if the drive has never been made bootable, it shouldn't have an mbr infection and so this would seem to be a false positive report and all is well.
Should it in fact have the infection, it doesn't pose a threat unless it is booted from again. I can't rule out the possibility that the drive was infected before you got your hands on it, even if you bought it new - hardware has been infected before shipping before.
All in all, i'd just keep using the drive as you are, for backups, and find something else to worry about. Apart from a quick update, you're done as far as I can tell.
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Your version of Sun Java needs updating:
1) Go here and click on the
Windows XP/Vista/2000/2003 Offline link in the
Windows section near the top and save it to your Desktop.
2) Download
JavaRa from
here and save it to your Desktop.
You will need to extract the file(s):
Right click on the zipped folder and from the menu that appears, click on Extract All…
In the 'Extraction Wizard' window that opens, click on Next> and in the next window that appears, click on Next> again.
In the final window, click on Finish
***Please close any instances of Internet Explorer before continuing!***
- Double-click JavaRa.exe to begin.
- Pick your preferred language from the drop-down menu and click Select.
- Click on Remove Older Versions to remove older version of Java - obvious really, isn't it!
- Click Yes when prompted. When JavaRa is done, a notice will appear that a logfile has been produced. Click OK.
- A logfile will pop up. Please save it to a convenient location, just in case you have any problems with Java afterwards.
3) Run the installer that you downloaded earlier.
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I want you to run your PC as normal for a few days and when you are happy that everything is fine, do the following:
Disable System Restore,
Reboot your PC,
Re-enable System Restore,
Create a Restore Point - this will give a clean one should you need it in the future.
A tutorial for System Restore is
available here.
The reason for waiting is that if removing the malware has caused a problem, which it occasionally does, you can put your PC back to how it was before the fix. This will re-install the malware, but an infected PC is better than an expensive paperweight!
Some bedtime reading:
This is a very good tutorial about keeping your computer safe and secure on the internet.