What function keys do i press on startup to re insatll the operating system on my acer aspire 3690

I believe that you need to press the Fn and Right Arrow keys (at the same time) to increase brightness and the Fn and Left Arrow keys to make it less bright.

1. Restart the Acer Aspire netbook by pressing the "power" button on the netbook's keyboard or by pressing the "CTRL," "ALT" and "DEL" keys at the same time.
2. During startup, hold down the "F8" function key immediately when you see the "Acer" splash screen and the option for entering "Setup."

3. Keep pressing the "F8" key until the "Advanced Boot Options" menu appears.
If you receive a "keyboard error," restart the Acer Aspire and repeat step 2.

4. Use the arrow keys to navigate to the "Safe Mode" selection on the "Advanced Boot Options" menu.
The arrow keys are located on the right-hand side of the Acer Aspire keyboard.

5. Press the "Enter" key to execute the "Safe Mode" selection.
The Windows operating system will now start in "Safe Mode" and you can perform a system restore or make needed changes to get your Acer Aspire to boot normally again.

1 Restart the Acer Aspire netbook by pressing the "power" button on the netbook's keyboard or by pressing the "CTRL," "ALT" and "DEL" keys at the same time. 2 During startup, hold down the "F8" function key immediately when you see the "Acer" splash screen and the option for entering "Setup." 3 Keep pressing the "F8" key until the "Advanced Boot Options" menu appears. If you receive a "keyboard error," restart the Acer Aspire and repeat step 2. 4 Use the arrow keys to navigate to the "Safe Mode" selection on the "Advanced Boot Options" menu. The arrow keys are located on the right-hand side of the Acer Aspire keyboard. 5 Press the "Enter" key to execute the "Safe Mode" selection. The Windows operating system will now start in "Safe Mode" and you can perform a system restore or make needed changes to get your Acer Aspire to boot normally again. Read more: How to Boot Up Acer Aspire in Safe Mode ' eHow.com http://www.ehow.com/how_5802430_boot-acer-aspire-safe-mode.html#ixzz1dtOxfxaD

You need restart your computer and keep hitting key "F8" while starting up
This will show list of startup available.
Then you need to select "Safe mode" using Up/Down key and hit enter.
This will take you to safe mode.

On startup you will see a message on the acer splash screen to get into "SETUP". This will either be the DEL key or the F2 key.

Go into your BIOS and make sure that D2D recovery is enabled. If you do not see this D2D option then you can exit and should not have to adjust anything else.

when you restart the PC again, hold down the ALT and tap on the F10 key, this will start the recovery partition and load your system to factory default.

This option will only work if you still have your original hard drive in the PC and you have not reformated or reinstalled windows from another media souce.

press and hold Fn and then press up the up arrow key

Are you looking for a product key to install Windows?
If so there should be a Microsoft label on the bottom of the Acer which has the Product installation key printed on the label.

ive heard of this problem happening often with ms vista and nvidia video cards try going to nvidia website and make sure you have the latest drivers

try to install luanch manager. you can download it from acer website.

for that, they don't have any driver. to fix your problem is reloading the operating system to default factory.