Has anyone else noticed that when they installed any of the sims games (I have all minus the stuff packs) that their computer acts up a little.  For example.  Without the games, I didn't have many issues with videos or pictures.  When I downloaded it again, I noticed these problems popped up again.  If I go to a website like YouTube, the videos never load properly.  If I got to something like Myspace, some of the pictures show up distorted and discolored if that makes sense.  Anyone else witness anything similar.  I don't have any hack conflicts...the game runs fine when I play, but when it's not running and I'm just surfing the net or something, I come across these problems.  Also, websites start to give me "error codes" like Message Authentication Code etc. etc.
Any help?  Greatly appreciated 

*attached image removed*