(Read more: How secure are your credit cards?)
"Both Windows and Mac desktops and laptops are unequivocally the most exposed to the most invasive infections, ones that enable the attacker to take full control of the device," said Byron Acohido, reporter at USA Today's CyberTruth.
Desktops are a landscape that attackers know very well, but the good news is patches and AV software can go a long way to keeping users safe, said Max Eddy, junior software analyst at PCMag.com.
Mobile app infections are newer than desktop attacks, but hackers are well known to be quick learners.
Experts suggest users stick to known apps from trustworthy sources.
(Read more: Hack attack at Snapchat)
"Think critically about who you want to know what about you," said Eddy.
The worst-case scenario, according to Eddy, is losing control of your email account, which can be used to recover passwords from other websites. Eddy suggests using a password manager, such as LastPass.