...and you have to do it now.
While cleaning fans, hold the blades with a pencil, so the blades won't get damaged.
Of course, all this activity with computer off.
When done, keep the case open, turn computer on, and see if all fans are running.
Finally, run SpeedFan again, and post the results.
This is something i will have to do after the w/end. Just remembered that i had a new PSU fitted about
4 months ago. Once fitted (by shop) there was an error msg reference the computer overheating. The guy instructed
me to go into the BIOS and to alter something to stop the error msg appearing. He mentioned that the new fan ran
faster than the original hence the error msg. (hope this makes sense).