I'm having problems playing certain Animes.

Error Messages range from no Codec to corrupted file etc and/or no audio from the Anime file during playback

This is the most common problem encountered by most Anime Lovers. These errors usually occurs due to missing or outdated Codec. A recommended Codec package to update your Codec files is Ace Mega Pack. It's updated regularly and will enable you to play the Anime files from the older to latest Anime Series. You could also obtain DivX codec from http://www.divx.com/

The Videos playback seems to be slow/jerky.

Due to the compressed nature of the Anime files, it requires lots of system resource for smooth playback. Try disabling some non critical programs to free up more system resource. However, under to circumstances should you disable your firewall nor anti-virus programs. They are there to protect your system. And if you don't have them, better get them now!! Also defragging your HDD might also help. Scan your system regularly too for spy wares (I recommend the free anti-adware from Lavasoft).