doubt it, Have you tried reinstalling the codecs. Also, have u done any major changes in hardware..
Are you using the new harddrive in the system. If so, is it a slave and you have the old one as the master. If so, Switch them, if the new hd is faster, that should be the master. If you machine supports more then 2 IDE ribbons, make each hd use there own. Normally Raid motherboards allow this.