Gosh Dee !!!! Did you remember to put the keys back in the right spots?......LOL
Don't you live on a dirt road?
We do, I clean our computers monthly.
I take ours out to the garage and stand back a few feet and use a air compressor on it. Dust is a killer to computer, it clogs the power supply, the fans and the fan on the video card. I also take the keyboards out there too. We have gaming keyboards, I don't pop the keys off though. A little alcohol on a q-tip gets between the keys. And I use alcohol swabs to clean the track balls.
And to keep my computer cool I have two fans pointed on it. Those small 10 dollar ones from Wal Mart.