I would look through the startup and get Autoruns. Autoruns for Windows
Look at the taskbar when comp starts up. most of the time this is filled with tons of stuff that the user doesn't even know is running or what it is for. She probably isn't using Google Desktop, Yahoo IM, Google IM, Myspace IM, Messenger, Weatherbug, Ask.com toolbar... the list goes on.
If you want to do her a favor and make it run better, ask her which ones she uses. if she says no, then disable it, if she says "I don't know what that is" disable it. ......Edit: Disable it only if you also know what it is
......... She might be using a Google Addon for IE, but the desktop and IM and all those usually self install without the user even knowing what they do.
I see this all the time. you should also use CCleaner to clean up all the temp files and then also defrag the HD since it probably has never been done. CCleaner - Optimization and Cleaning - Free Download