As no logs are posted and your previous topic here: http://www.bleepingcomputer.com/forums/t/202079/win32bhonmk-or-nmg-or-nmd-trojan/
is closed, I am moving this out of the HiJack This forum to the Am I Infected forum.
Do you think it is safe to transfer everything to my external hard disc?
Unlikely. Someone else can provide more specifics but assume any program file has been compromised and should not be transferred.
And how safe is a free or cracked antivirus software (I use NOD32) in comparison to a paid one?
To answer the second part first, ANY and ALL cracked software is dangerous to acquire if not use.
University of Washington spyware study
...the University of Washington study on spyware...warez/piracy sites ranked the highest in downloading spyware...just opening the web page usually sets off an exploit, never mind actually downloading anything. And by the time the malware is finished downloading, often the machine is trashed and rendered useless.
If you use those kind of programs, be forewarned
that some of the worst types of malware infections can be contracted and spread by visiting crack, keygen, warez and other pirated software sites
. In many cases, these sites are infested with a smörgåsbord of malware
. Those who attempt to get software for free can end up with a computer system so badly damaged that recovery is not possible and it cannot be repaired
. When that happens there is nothing you can do besides reformatting and reinstalling the OS.
Free programs is another story. You do need to be certain that you have a good program and not a rogue. Fortunately, we have a topic here at BC that lists several free programs recommended and used by our members here. You can find them here: http://www.bleepingcomputer.com/forums/topic3616.html
You may also wish to peruse this forum http://www.bleepingcomputer.com/forums/f/25/antivirus-firewall-and-privacy-products-and-protection-methods/
in which people discuss various security programs. Just remember that what works well on one computer may not work well on another.