Is this a good program for pc protection ?
No, many experts agree that Windows Live One Care is on the bottom of the
list as far as finding virus\malware\trojan.
What you really need is to establish a Security Concept.
The most dependable defenses are:
1. Do not work as 'Administrator'; For day-to-day work routinely use a
Limited User Account (LUA).
2. Secure (Harden) your operating system.
3. Keep your operating (OS) system (and all software on it)
updated/patched.
4. Reconsider the usage of IE and OE.
5. Review your installed 3rd party software applications/utilities;
Remove clutter.
6. Don't expose services to public networks.
7. Activate the build-in firewall and configure Windows not to use
TCP/IP as transport protocol for NetBIOS, SMB and RPC, thus leaving
TCP/UDP ports 135,137-139 and 445 (the most exploited Windows
networking weak point) closed.
7a.If on high-speed internet use a router as well.
8. Routinely practice safe-hex.
9. Regularly back-up data/files.
10.Familiarize yourself with crash recovery tools and re-installing your
operating system (OS).
11.Utilize a real-time anti-virus application and vital system
monitoring utilities/applications.
11a.A couple of A-S applications may be benefitial.
12.Keep abreast of the latest developments - Sh!t happens...you know.
The least preferred defenses are:
Myriads of popular anti-whatever applications and staying ignorant.
Good luck