Are you using any on-demand scanners? Is Chrome equipped with any addons? Do you keep a back up of your system or at least of your most important files?
If not, I'd suggest adding at least one on-demand scanner (HitmanPro, my recommendation) and the following addons for Chrome: uBlock, WOT & HTTPS Everywhere.
You should also consider using CCleaner (if not already) for cleaning your broswing traces.
Thanks for sharing!