An old post I know, but through pure relief I just HAVE to add here that this morning I too was getting this 'Parser Message' each time I tried to open 'Add/Remove' in 'Control Panel'. I've been a computer user for 6 years but fairly new to XP and Visual Styles. I panicked first, then did a search and found this site and this post. THANK YOU!!!!!!!
I've bookmarked this forum.