Strange topic title, your memory update has noting to do with you pc problems your having now. I suggest you install that webtheme again and then use the un-installer.
You should have known that you don't uninstall software by deleting it in windows explorer. Windows XP has also a recovery module which you could use to set the system one or two days back when everythings was working well. Don't tell me you don't know the system recovery module. Use the search on your pc to find more about it. Are you only new to burners??
This thread can be closed, crossposting.
You got excellent help from here. So why start another thread??