How to keep your pc reasonably secure

Hi all!
In my last post i described a simple key logger that was made from *downloadable tools from internet* and just by changing few configuration settings. Its no exaggeration to say that even a 3rd grade student, given the tools can pack the custom key logger.

So how do i protect my computer? Lets re-phrase: How do I make my computer better?

•  Make sure your antivirus is up to date. and if you do not already have one, i recommend Avast or AVG, both of which provide excellent free service. Even Microsoft Security Essentials does a really good work, except that it consumes a lot of resources
• Use an antivirus that detects based on behavior. not just its virus signature database.

•  If you are someone who uses cracked software, It is a good idea to run the application "sandboxed". It provides an additional layer of security. I actually recommend running all normal applications in sandbox. especially your web browser. details can be found by clicking the above links..

•  Apply OS patches as soon as they are available. Most of the time they fix some or the other vulnerabilities. (don't ask me how its possible. I do accept windows is good, but there are probably more bugs in windows than hairs on your head. P.S: No offence to readers who are bald-headed.. :P And i dislike windows.. so u may assume there's a lil exaggeration.. ;)

• Use windows System Restore.. set up restore points once a while. Using it in conjunction with Windows Backup will surely be better. Digital data can get corrupt anytime.. (the probability is mostly low, though)

• Securely erase all sensitive data. If you have some really sensitive data.. Go ahead and use TrueCrypt. even FBI couldn't crack it after one year of effort..

• If you are a hacker or a frequent tester, consider using virtual environments. (If you already don't, in which case u are not a good-hacker. Again No offense guyz.. )

• DO NOT install any arbitrary browser extension u see. A minute of research will save u a lot.. Better Be Safe Than Sorry ;)

       P.S: Chrome web store and Mozilla Extensions gallery are the only ones i trust. Always download directly from the official provider.

• Whenever possible, verify the md5 hash of what you have downloaded to ensure that there was no tampering. This is especially important if you are downloading some security related software.

• Always type the URL yourself or open from google search results page. Look out for phishing pages. Never respond by email or clicking links in email to trusted sources such as banks, etc without actually verifying the identity.

Any other good tips are welcome as comments from users.

Cheers,

Mahesh.