Msconfig is a useful built in tool in windows that you can use to control which 3rd party applications load in at startup. Trimming these can significantly speed up the time it takes to boot up into windows to the point you can start actually doing stuff.

Start>run>msconfig

Alternatively you can use the neat little tool startupcpl from mlin.net

If you need to check if you should disable something or not there is ~27000 item searchable database here