When I click that a window pops up, it has a button that says Back/forward, home,
Okay. The Top Sites button should be between those two buttons on the top row of that windows.
I'm wondering if you might have a damaged com.apple.Safari file in your user account. (If that's damaged, it can cause other buttons and things not to appear ... so maybe that's going on here as well.)
Quit Safari. Now go "Start > My Computer". In "My Computer", go "Tools > Folder Options" and click the "View" Tab. Make sure that "Show hidden files and folders" is
selected. OK out of the Tab.
Now Open Local Disk (C:).
Open "Documents and Settings"
Open the folder that has the name of your user account on the PC.
Open "Application Data"
Open "Apple Computer"
Open "Preferences"
Drag the
com.apple.Safari file out onto the desktop.
Now launch Safari again. (This will rebuild your com.apple.Safari file.)
When it finally opens, can you see the Top Sites thingy in the Bookmarks bar next to the book, or the Top Sites button in the "View > Customise Toolbar" window?