Yes, something could have downloaded in the background. Malware is very sophisticated these days. It can be running on your machine and you'd never know it. Very often the malware is just a mechanism used to infect the machine with something far more malicious like a keylogger or a root kit.
Anti-Malware software will miss a lot of stuff. As said, run MalwareBytes. But you can do more to protect yourself in the future. Best of all this stuff is all free.
Remove Malware Magnets - Goes for both Windows and MAC - JAVA โ just get rid of it. Very few people need it for anything. Remove all versions of JAVA in Programs and Features.
- Flash player - If you really need it for some YouTube videos and other things, make sure to keep it up to date with the latest version
- Adobe Reader (replace with PDF XChange Viewer or similar, http://www.tracker-software.com/product/pdf-xchange-viewer)
Use Open DNS http://www.opendns.com/ - Free web and malware filtering for home users for Windows, MAC, Android, iOS
- Intended to be a "net nanny" for families, but anyone can benefit from this
- Automatically blocks known identity theft and phishing websites
- Nothing to install on your machines
- Set up your home router with OpenDNS and all your DHCP devices are protected
- Highly configurable, many built in categories, can allow or deny specific URLs as needed
Use Bluecoat K9 http://www1.k9webprotection.com/ - Free web and malware filtering for home users, for Windows, MAC, Android, iOS
- Uses the same engine and database as their commercial security appliances use
- Intended to be a "net nanny" for families, but anyone can benefit from this
- Automatically blocks known scam, spyware, and malware websites
- Must install software on each device, doesn't slow down the device
- Highly configurable, many built in categories, can allow or deny specific URLs as needed, however must be configured on each device
RogueKiller http://www.adlice.com/softwares/roguekiller/ Free malware/rootkit scanner
Windows only
Secunia PSI (Personal Software Inspector)
http://secunia.com/vulnerability_scanning/personal/ Free
Windows only
Scans all your installed software and reports what's out of support, what's missing security patches, and what's up to date
Chuck D.
โAdventure is just bad planning.โ - Roald Amundsen
2013 Jayco X20E Hybrid
2016 Chevy Silverado Crew Cab Z71 LTZ2
2008 GMC Sierra SLE1 Crew Cab Z71 (traded)