I'd test fly it with just Avast and Malware Bytes enabled.
See if snappiness improves.
You have a Celeron 2.80 with 1 gig of RAM. It isn't going to rock the world regardless of what you do.
Also: look at task manager/processes; how many processes do you typically have running?
40? 90?
Be sure to check "show processes from all users" in that tab.
The only way you are going to really improve performance is by upgrading the hardware. Turning off some startup applications might save a few seconds on the bootup. But in the long run, your performance is limited by hardware not software. And certainly adding a graphics card that can handle Aero will help.
I have 55 Processes running.
@logicearth: I'm aware of that, but PCI Graphics Cards are not as good as PCI-Express.
You can monitor your processes to see which are using up your CPU the most. But most of them will be unavoidable.
I have 41 running right now, and very rarely have 50 running.
Advanced System Care is a tweaking program with a questionable Reg cleaner.
Win7 is already too lean to need any tweaking whatsoever beyond normal system settings - it will always come back to bite you.
See if you can reverse the tweaks done already, then uninstall it with Revo in Advanced mode: How To Use Revo Uninstaller To Completely Uninstall Programs
I think the Network Magic software is also not needed once you install your router. Do you have paid Malwarebytes standing shield or is that it's updater only (never allow any updaters in Startup list as they spy on you).
The only startup programs I run are AV and gadgets.
Beyond that, here are tips for cleaning up a factory preinstall: HP laptop has used up all four primary partitions
And here a troubleshooting fundamentals for Win7 to trace any performance issues: Computer lags every couple seconds
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