Change time between screensaver-start and screen-lock

When the screensaver starts there are a couple of seconds I can tap any key and stop the screensaver without the screen becoming locked, despite having the on resume, display logon screen-checkbox checked in Screen Saver Settings. Only after around 3 seconds does the computer become locked.

Is there a way to change that time (-the time between screensaver-start and screen-lock)?

Solution 1:

This can be configured through the Registry (and the default value is 5 seconds):

• Key: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
• Value: ScreenSaverGracePeriod
• Type: REG_DWORD
• Value: time in seconds

(Source: various google results for "windows screensaver grace period")