Best PC cleaning software: PC Decrapifier

Just about every new PC, if you don't set it up yourself, comes complete with a whole raft of software you neither want or need. But that second part of the equation can be a little difficult to fathom sometimes – who knows if removing a particular application will cripple your machine? Well, PC Decrapifier knows.
Run it on a fresh machine and PCD will skim through everything your PC's manufacturer has snuck in there, matching apps against its database to give you information about what the software does and whether it's safe to remove. You'll usually be able to wipe the offending software clean quickly and easily, often in an unattended manner.
So if you're picking up a new laptop, make sure you have this on hand – and PCD is even useful for cleaning up well-used Windows installations.