Below is a question from CNET Forums:
I keep reading where people should change their passwords frequently. That is fine if one does not have many places to go to change passwords. I have several hundred and to make frequent changes would be a pain in the butt. Even though my password is relatively secure, if someone hacks into Yahoo, Google, etc and gets my password from there, I probably won't know about it for some time, unless notified by the website. And I do have different passwords for different types of sites. I wonder if it is really worth all the trouble to change passwords frequently and to have passwords that are not easy to break.
Answer: One inescapable facet of web work is the need to come up with and remember usernames and passwords. The days when you could get away with picking a single combination and using it everywhere are pretty much gone: that strategy reduces your security to that of the weakest site you use. It’s simply not worth risking that the person who gets hold of some Web 2.0 startup’s database can also get into your online banking.
Since you have strong passwords for different sites, your problem is just how to manage your massive passwords.
1) Write it down. It’s actually not all that bad a strategy at home, if there aren’t too many people poking around there and you tuck it away somewhere nondescript. But this is bad at the office, where any number of people could see your helpful list.
2) Let the browser remember them. Browsers like Firefox will remember all of your passwords for you, and enter them back in when you go back to a site. Unfortunately, this limits you to a particular browser.
3) Use a password manager. These do-it-all client-side applications help you generate passwords, store them, and fill in online forms. On Windows, RoboForm (free for personal use) is a handy tool that memorizes passwords and fills out online forms in a single click.
And for your Windows passwords, it accidently happened that you are going to have your work done, turn on the computer, but when you input the password for the Windows login account, you just find out the password is no longer works. Then what to do? Take it easy, you can click the link to find how to reset Windows password.