As you probably know, many free download sites attach additional “drive-by” downloads to the files you download from their sites to your PC.

A relative handful of those “add-on” programs are actually beneficial, but the vast majority of them are simply junk that will bloat your system and slow it down.

Even worse, some add-ons that claim to provide a useful service are actually malware that will spy on you and/or do nefarious things and make it look like you’re the culprit.

One of the most insidious “drive-by” add-ons that you’re likely to ever encounter is a program called S5Mark.  [Read more…]