Before blaming on drivers or software, benchmark your reaction times!
They change along the day and can be improved by excercise.
I wrote a small program just to do so.
 

Catch the ghost!

I wrote this program to test my reaction times.
Start the program then click your mouse when the "ghost" shows.
After ten times the program will tell you your timings and
offer to save a screenshot (in the current directory) and
optionally upload it to an image hosting service.

It's useful to test (and improve) your reaction times and to
check your reaction times during the day; try it at different times
and you will see that your results will change.

A similar approach should be used IMHO to start your car;
in this way if you drank too much, or if you are too sleepy,
your car will just not start :)

Again. this program is donation-ware: if you like it and use it
regularly, hit the donation button.

Note:
the main difference between this program and many others you
may find online, is that this program uses
high resolution (and very accurate)
timers which are not available in modern browsers.

Upon request I can code customized versions.

Download

Namaste!
Zibri

P.S.
Avira or some other antiviruses may say there's a virus in this program.
It's a false positive and it happens only because the code is protected.

If you can't run the program,
download the latest dot.net libraries from

http://www.microsoft.com/net 

So?? What's your score?

Zibri I'm guessing you don't play computer games. They keep reaction times honed and sharp. I have no need for this, however that's NOT to say I don't appreciate what you have done. Kudos.

rapt0r: that 82 was nice but you got it by an 'educated guess' (unless you do that often and always get it).
 
@HalloweenWeed: I do, but I am not a gamer. Need? This program can be useful not only to check your reflexes (they change during the day and are affected by tiredness attention and alcohol)
@OV3RCLK4: No. 10 it's the minimum to get usable results. If you fail you HAVE to start over because otherwise the test would be very easy.
Oh, and what really counts it's the average value. Yours is 10ms faster than one of my best results :)

OV3RCLK4
Can you make one that is only 5 tests? Also if you fail you don't have to start over but instead you have to redo the last test that you failed.

Doing as you suggest will just give fake results. I made it this way to minimize the chance of "educated guesses".
And I gave it 10 to have a good average. 20 would work even better.