Slow Start Menu Caused By Invalid Shortcuts

I'll start with a bit of background so everyone doesn't suggest the usual tips for speeding up the start menu.I'm logged in as administrator and running XP and have had problems with the start menu - all programs list being stupidly slow to populate for a while, and no performance issues anywhere else. I've tried all the usual removing shadows, fade and slide; unchecking auto search for network folders and printers; fiddling with the menu order in the registry and checking there are no false entries, etc, etc, but with no joy.I then noticed in C:Documents and SettingsAdministratorStart MenuProgramsAccessories there are two invalid links to 'Tour Windows XP' and 'Windows Explorer', and whenever I get anywhere near this folder everything slows up, which suggests to me these are the problem (although I could be wrong).

When I try to delete these shortcuts I get 'Cannot delete Tour Windows XP: Data error (cyclic redundancy check)'. The location both shortcuts are pointing to is C:Documents and SettingsAdministratorStart MenuProgramsAccessories - so are these just pointing to themselves?I then went on to check C:Documents and SettingsDefault UserStart MenuProgramsAccessories and found both these shortcuts exist there as well, and are valid working shortcuts. Easy I thought, I can just copy these over to replace the invalid shortcuts and everything's fixed - but it asks me if I want to replace the existing file, and then says 'Cannot move Tour Windows XP: A file with the same name already exists. Specify a different name.'So I appear to be stuck with two invalid shortcuts in my menu that drive the processor mad anytime I go near them, and I can't delete, rename or point them at something else.