This is a laptop. It's the keyboard and mouse that's built into the laptop.
Blush!! Sorry I should have taken more notice of what you'd written..
So are you saying you cannot get into the desktop at all? If you can then there is a number of options you could try..
Ok, have you tried using a USB mouse to get yourself logged in? If you have and you can.... I've had a look at the Acer support site
Acer Europe, Middle East and Africa - Service & Support and I couldn't actually find a way to ask that particular question. As I'm sure your aware search engines are based on 'key' words and too many of them gets them all irritable 'n' snappy lol. Anyhow reading between the lines you could need a motherboard bios update. You'll need to find out what your using at the moment (you can usually see the details on the boot screen right at the beginning or you could try using something like Everest, Google for it and get the free trial). The drivers page for your product is here:
Acer Europe - Service & Support, Drivers & Utilities, Downloads, Notebook, Acer Aspire 3680 Series you can also get the bios update from here. It 'may' not need the bios updating I'm just saying this is a possibility, why not try re-installing drivers ect.. A method to do this without a disk is given below.
Re-install bundled software without CD
Acer eRecovery Management stores pre-loaded software internally for easy
driver and application re-installation.
1 Boot to Vista (If you can't actually get into the Vista desktop because of the problems you describe, try doing this at the boot process).
2 Press <Alt> + <F10> to open the Acer eRecovery Management utility.
3 Enter the password to proceed. The default password is six zeros.
4 In the Acer eRecovery Management window, select Recovery actions and
click Next.
5 In the Recovery settings window, select Reinstall applications/drivers and
click Next.
6 Select the desired driver/application and follow the instructions on screen
to re-install.
At first launch, Acer eRecovery Management prepares all the needed software
and may take few seconds to bring up the software content window.
I hope that you can glean a solution from all this. If not please shout back and we'll have another go in finding a cure.
Regards