DD
I will e-mail you the 9.1 update, it's a small file.
Cleaning your system is easy. All you need is a small brush, a dry clean tooth brush, and a can or two of Electronics Duster spray.
Shut your system down, unhook all the wires...and I mean ALL. Set your tower one something solid and at a level to where it is easy to work on.
The first thing you want to do (and this is VERY VERY VERY IMPORTANT): Press and hold the power button for 30 seconds or so. This will drain the power from the capacitors and reduce the risk of frying the board with an errant discharge.
Now, open your system and take a good long look at all the components. Make a mental note of were every wire comes from and goes to...in case you knock one loose or have to remove some to reach all the nooks and crannies.
Begin with the tooth brush, loosening the dust/dirt on the cards, the case, the fans. Then use the smaller brush to really get into the corners and places were cards meet the motherboard and such.
Take a good look at the heat synks...those finned metal things with fans on them. If they are packed with dust, grab a few tooth picks and clean the dust out of the recesses.
Now, using the canned cleaner spray, begin spraying the dust off of things. Be careful to keep the can upright and not to shake it...doing otherwise will result in a fair amount of liquid being sprayed into your system...not a good thing.
Also, when you blow the dust out of your power supply and off of the cooling fans, use a tooth pick, Q-Tip, something, to hold the fans in place. DO NOT let them spin in the spray....doing so could result in the fans being spun faster than their rated RPM and could damage the fans...you don't want to send any fans into premature death.
Once you have every possible speck of dust/dirt/dog hair/cat hair ect cleaned out of your case....let it sit open for an hour or so...just to make sure all the fumes are out of the case and that the boards are totally dry (in case you get some moisture from the electronics cleaner).
Once done with all that....close the case up, hook it back up and fire it up.
You should clean your system at least once a month...more often if you have pets or live in a dusty environment.
OBIO