Best freeware system tools for windows XP ? (internet security / ram optimization / defrag / registr

After a lot of personal research, straightforward testing, and lessons learned, I came up with the following freeware solutions for keeping my system up and running.

FIREWALL

- COMODO Firewall Pro

ANTIVIRUS

- AOL Active Virus Shield (based on Kapersky)

- a-squared free

ANTISPYWARE

- SUPERAntiSpyware Free Edition

- Microsoft Windows Defender

- SpywareBlaster

- McAfee SiteAdvisor

REGISTRY CLEANER

- Advanced WindowsCare V2 Personal

- CCleaner

ANTISPAM

- SpamBayes

DEFRAGMENTER

- Speedfrag (a bit akward to use at first, but simply the best one available for free)

MEMORY OPTIMIZER

- Cacheman

All those software are free to everyone for personal use, they are also easy-to-use, non-intrusive (almost no pop-ups windows) and low-memory consuming.

My laptop is now booting up in 55s with 659 Mb of free RAM available (out of 1Gb total), and is decently fast.

I consider it good, but I would like to make it even better.. Any advise?

Best freeware system tools for windows XP ? (internet security / ram optimization / defrag / registry)?internet

The /himem /lomem switches are helpful. But that's too geeky for alot of folks.

Best practice that I know of is a Backup Routine. On install before you go online, backup everything, registry, program sys files. Keep these backups near or in the case with the PC/Laptop. After any install or altering/editing or removal of a program, make another backup. This is called B1 and B2. Use B1 when your system gets a bad virus and use B2 to restore any data that may have changed.