Files hosted on unofficial "repack" or "free download" sites frequently contain hidden malware, spyware, or trojans.
Pro tip: If a file claims to be "Adobe Photoshop CS4 Extended Portable" and is only 45MB, it is 100% a virus. The legitimate portable skeleton is never that small. adobe photoshop cs4 extended free download portable
Fortunately, there are legitimate alternatives for those seeking to use Photoshop without the cost: Files hosted on unofficial "repack" or "free download"