The items in the right-click menu are called shell extensions or context extensions. Shell extensions usually appear all the time. Context extensions appear for certain file types. Like it you right click a .doc file an option will appear to open with Word.

If you have a relative idea what you want to remove you can use AutoRuns - [url:2ivp7bid]http://technet.microsoft.com/en-us/sysinternals/bb963902.aspx[/url:2ivp7bid].

This is a very powerful program what will let you modify quite a few things in Windows. [b:2ivp7bid]You don't want to go around unchecking things willy nilly, or you will be in trouble![/b:2ivp7bid] Be sure to right click the program and select "Run as Administrator" or you won't be able to make any changes.

Run the program and click the Explorer tab. This is where you will find the items you want to remove. It would be a good idea to write down exactly what you want to remove (i.e., which programs have added things that you don't want). Go to Options at the top and select "Hide Microsoft Entries", then click the little refresh icon in the tool bar. You will now have a list of shell/context extensions added by programs you've installed. Uncheck the ones you don't believe you need. close the program and reboot. Problem solved!