Soluto is an ingenious PC speedup tool that will analyse the programs launched when your PC boots, and point out any that you can really do without.
There are no complicated options or settings to consider, just install the program, reboot your PC and Soluto will run in the background, monitoring what's going on. When the process is complete you'll get a report telling you how long the boot took, and separating your startup programs into three groups: "No-brainer" (apps that can safely be removed), "Potentially removable" (you might be able to ditch some, but Soluto isn't sure) and "Required" (these must be left alone).
Choose a program you think is surplus to requirements, and you can tell Soluto to delay it, launching the app only when your PC is idle. Or you can Pause the program: it'll then only be launched on your command, via Soluto's system tray option.
When you've finished, restart your system and Soluto will measure and report your new boot time, so you can see exactly how much time you've saved.
Soluto only optimises your boot if you let it run all the time, which is a little annoying. Still, if your PC takes ages to start and you've no idea what to do about it then this is probably one of the simplest solutions around