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On a laptop, the "Num Lock" key has a function slightly different than the one it performs on full-d desktop keyboards. Activating "Num Lock" on a laptop usually transforms a set of central keys, including many letters, into number keys, allowing typists used to entering numbers on a keypad to type efficiently. While on desktop keyboards "Num Lock" usually has a dedicated key, on laptops it often shares a key with another function on MacBooks, for example, it shares the "F6" key and you must hold down the "Shift" or "Fn" key to activate it.
Look for the "Num Lock" key on your laptop's keyboard. This is usually near the top of the keyboard. If the key says nothing on it except "Num Lock" if that's the only function the key performs you can just press it to activate the lock; a light will probably go on somewhere to indicate that "Num Lock" is on. If the key has multiple functions, you'll have to hold down a different key while pressing it. Hold down "Shift" and press "Num Lock" if the writing saying "Num Lock" appears above some other writing on the key, the way various symbols appear above the numbers on the keyboard's number row. Hold down "Fn" and press "Num Lock" if the writing saying "Num Lock" appears in a different color often light blue that's shared by the "Fn" key.
Step 1: Which model of acer laptop ? there are many
The BIOS (Basic Input Output System) is designed to check the integrity of the computer hardware and launch the operating system. The BIOS also has basic security features that prevent unauthorized access to the computer by locking the hard drive with a password. The password is required in order to launch the operating system. That option can be disable without an changes to the operating system.
Turn your computer on. Press "Esc," "Del," "F2" or "F8" to access the BIOS. Use the arrow keys to go to the "Security" tab. Press "Enter." Highlight "HDD Lock," Boot Password" or "Hard Drive password" using the arrow keys. Press "+" until "Disable" appears. Go to the "Exit" tab, highlight "Save and Exit" and press "Enter." Press "Y" when prompted to reboot your computer without the hard drive password.
That means you have the Num Lk (Number Lock)key on. And when you Press and Hold the FN function key at the lower left portion of the keyboard plus the keys you specified above the number appears instead of the letter.
Just hit your Num Lk key at the top of the keyboard to turn it off.
I just came here looking for a solution to the same problem. I have an Aspire 1800 which has a front panel of buttons for the Arcade mode. Basically i just wiped all the buttons again resonably vigiously as i was pissed off and low and behold the FnF6 works again. I tried this after i read another artical suggesting the removal of the touchpad driver. so obviously something is still depressed much like a sticky key which basically switches the screen immediatly back on as i had a flicker at least when i did FnF6. Hope this helps..
I am using ACER (Aspire 4520),with Windows Vista BASIC & then once i have format my laptop & install Vista Ultimate on it from that time my webcam is not appearing on desktop & I am enable to use web cam & another problem is when I have install yahoo massager that was installed on the time I start working all of the sudden it disappear plz provide me solution of this
if you knew that on the hidden partition contains all the drivers and the vista you will need to do system restore or system recovery
-point to all programs
-click system restore
-restart your pc
-i dont know the unit of your laptop but there's a message on the screen (black screen) that says to press F8 to go to recovery (some of the computers tells to press F9 or F10, just follow which function key you will press that will appear on the screen
-click system recovery then follow the steps that will appear on the screen
try holding down the function key and hitting the numlock or scroll lock key, this is usually how you engage or disengage the laptops function keys on the keyboard. Most laptops have a light that will turn on and off when you do this, indicationg that the funtion keys are in use. depends on the brand