Often this is because they continually use very risky
processes that the average user would never dream of using.
A virus could be Free Spyware Scanner a
sort of malware that, once dead, replicates by inserting copies
of itself (possibly modified) into different laptop programs,
data files, or the boot sector of the exhausting drive; once this
replication succeeds, the affected parts are then "infected".
The first malicious applications were created as pranks,
but in early 2000 hackers began using malware for profit.