1> Uninstall all programs that aren't used. This includes speed loaders, auto updaters, any "trial" software and tech support programs. You simply don't need these.
2> Reboot the computer. Go into safe-mode at this point (F8 during boot) and run a full system scan with your anti-xxx software just to make sure there aren't any baddies. Reboot again.
3> At this time I like to disconnect the computer from the network and uninstall all anti-virus/anti-malware/anti-spam (hence the term anti-xxx) software, ESPECIALLY if you have Norton or Mcafee installed. Those are huge memory and resource hogs, and there are plenty of free anti-xxx softwares available that work reasonably well without being nearly as obtrusive: Microsoft security essentials, Avast, AVG, etc. Don't re-install any anti-xxx software just yet.
4> Reboot the computer yet again. You'll be down another 5 or 6 processes.
5> Go into your flash settings, java settings, adobe settings, and any other program that you recognize in the task manager and disable their "update automatically", "load on bootup" and their "make this program load faster" or similar options. Each program is different, but this stuff is usually buried in the File/Options or Tools/Options menus. Also do the same with any toolbar icons (bottom right of screen) that you don't use regularly. Sometimes you can right click on the icon and select Properties or Settings and it will have the option to turn the icon off. You can turn them off if you don't use them regularly as this will only stop the program that makes the icon appear, but the main program itself will still exist.
6> Go to START/PROGRAMS/STARTUP and delete anything in there that you don't want to load at start-up. Keep in mind you'll only be deleting the Startup shortcuts for these programs and not the programs themselves so don't be scared to do this.
7> Reboot the computer once again. At this point hopefully you're down to under 50 processes. Now you can go in and google each one and see what is normal and what is not. I've seen these so much I can pretty much pick out what is not normal and what isn't but this can get a little time consuming. Just google.com and type in the name of the program in the seach bar and you can usually see in the first 5 listings what it is without having to actually click on it (example: spoolsv.exe). Ideally you want to do this on another computer so you don't expose the laptop to the internet unprotected.
8> If you find entries for a program know you don't want, then go in and uninstall that program. If you're not sure, than google the name of that program because some programs depend on other programs in order to work correctly. One well known program may need another program that you've never heard of and I know it gets confusing, but take your time and you'll eventually weed through it all. If you don't have an option to uninstall a program then sometimes you can find the uninstaller by going into Drive C, "Program Files", "ProgramName". If you can't find it there, then try googling "uninstall programname" and you can usually easily find instructions on how to uninstall something.
9> Once you're happy that you've got it all taken care of, then reboot the computer and make sure nothing new comes up, and then you can reinstall whatever anti-xxx software you want.
10> Feel free to visit blackviper.com for information for information on a lot of the most common processes, and also feel free to download a program called
"Glary Utilities" which has a lot of neat stuff for keeping your computer maintained. The thing I like most about it is you can load its startup program list and task manager and it will show you (based on others' comments) how bad or good each program is. You can also click on each to learn more information about it. It's pretty neat I highly recommend it. No need for the pro version, just use the free version.
As far as keeping the computer light and snappy, it's usually a simple matter of going into a programs settings right after you install it and disabling the 'auto update' and 'run when windows starts' options, just keep in mind that it's a good idea to manually update those programs from time to time (after which you'll likely need to go back in and disable those options again)