Will Windows show a warning if someone tries to guess my password for a lot of times?

"Windows doesn't display a screen warning, but you can audit the logon attempts:

Log on as an administrator
Click Start, click Run, type mmc /a (note the space between mmc and /a), and then click OK.
On the File menu, click Add/Remove Snap-in, and then click Add.
Under Snap-in, click Group Policy, and then click Add.
In Select Group Policy Object, click Local Computer, click Finish, click Close, and then click OK.

At this point, you might want to save this console for further use. Note: you can add multiple snap-in and manage multiple computers from this console.

On the left hand side, navigate to Local Computer Policy -> Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Audit Policy
On the right hand side, double-click ""Audit Logon Events""
Check the boxes for Success and Failure, click OK

Now any time a logon is attempted an entry will be created in the Security Log, which you can view with the Event Viewer."

"No it doesn't.

Suggestions:

Create strong passwords and change them every three months--that usually helps. Another thing I incorporate, is start the password with a space. Additionally, I recommend using phrases, than words. Finally, you could try an encryption solution for additional security, giving access to specific users."