Portable Start Menu

Portable Start Menu is a simple and free start menu application that can be installed on USB sticks or local PCs. Organize your programs in a simple menu system and launch them via a tray icon. If you close Portable Start Menu on a USB-Stick, running applications can be closed automatically, too.

http://www.aignes.com/psmenu.htm

Tiny Watcher

Tiny Watcher keeps your Windows clean. The way Tiny Watcher works is pretty simple: basically, it starts by taking a snapshot of important parts of your Windows system, then it tracks changes (every time you log in, or whenever you want to). When a change is detected, you are notified.

http://www.donationcoders.com/kubicle/watcher/