best free windows antiviru

Which is the best Free Windows Antivirus?

those are the AVs i did test:

• clamwin
• avira
• avg

AVG:
is probably the best, well updated.
It also has a nice internet protection which analyzes any link in every page you surf ... even on google pages. it display a green mark when the link if fine ... but pretty annoyng for me.
The worst this, running on my old laptop, was considerably downgrading the perf, so i had to remove it.

UP
- Frequetly updated
- Internet surfing security
DOWN
- Quite heavy for older machines

AVIRA:
Pretty nice.

UP
- Frequently updated.
DOWN
- Quite heavy for older machines

CLAMWIN:
it's open source, released under GPL, thus preferred for not comerrcial uses.
It doesn't has automatic scanning, this makes this product a bit more for experienced users those who knows, beside an AV, when a file could be a problem.
On the other hand, this passive scanning has a very low inpact!

UP
- Very low impact on system
DOWN
- Doesn't have an automatic scan (you have to manually scan)

MY CONCLUSIONS:
On my desktop i use AVG.
On my slower laptop i use CLAMWIN.

Most usefull disk utility for Windows: jkDefrag + pagedefrag

Here's a couple of disk utilities for Windows.

Both softwares are completely free, and without any time limit!



<1> jkDefrag is a disk defragmenter and optimizer for Windows 2000/2003/XP/Vista/X64.
No install, no configuration. Just run it!
Can even scan USB or MemoryStick disks.
Also available: a (1) command line version, (2) a DLL to build in your own apps, and (3) a screensaver version.


<2> sysinternals pagedefrag provide you the ability to see and fix your paging files and Registry hives fragmentation.
Normal defrag utilities can't access those files, and since those files are the most used on windows, this software is a must to have.

It runs at boot time. No install or configuration to do.
Just run it and select "run at next boot" (it runs before the login screen).

- Administrators sets pagedefrag to run at every boot on client's pcs.
Select "run at every boot" ... it's fast, easy, and ... most of all, works great!
The 1st time it may take some minutes, but if used at every boot, it takes few secs to run.

- I suggest you to take a look at the complete sysinternals suite.