Many browsers render images with "helper apps" or decoders provided by the OS.
This is nothing new but your post doesn't seem out of the ordinary in any way. Mayne there is more going on here but you mentioned SpyBot which can create issues today.
I'd update my list if I were you and take Grif's advice for what to replace it with. Link follows.
I have huge computer problem, some images don't display in all browsers, I tried everything ! I re-installed IE and chrome, I even installed Firefox, I scanned the computer multiple times, with SuperAntiSpyware, Spybot, Malwarebytes, AVG Internet security, it didn't find any viruses or problems. I checked browsers settings, deleted cookies, defragemnted disk, did system restore, still nothing! Any help would be appreciated. Thank you