After I deleted those old adware programs a few days ago, I've been doing daily scans on the entire filesystem including home. So far, it hasn't found any new or old malware. I even installed rkhunter and it found zero rootkits.
This was just a rare incident when I changed the useragent to resemble IE sometime in the past and a bad site I went to though I was using windows.
Remember, it was windows's malware that was found by clamAV and not a linux malware.