Thanks for the reply, I'll check those links out. I forgot to mention in my original post that the CDs that skip are certain CDs, I also forgot to mention that these are professionally made commercial prerecorded Cds. To get specific The CDs in question are Black Sabbath Cds, being the Paranoid, Sabbath Bloody Sabbath, Technical Ecstasy, and Never Say Die discs that are part of an earlier release of the Black Box boxset on the Rhino label that's part of Warner Music Group. They could be bad pressings or the glass masters that were used could have had errors. I'm not sure about copy protection or anything. The Master of Reality, Volume 4, Sabotage, and Black Sabbath(album) discs paly fine and the tracks ripped clean. These discs are kept in cases, and have never been subjected to bright sunlight, temerature extremes or anything and aren't scratched. I do have a CD-R, specifically a DataPro 52x 80min/700Mb of some music and the tracks have all of this static in them. It doesn't matter with that CDr, it was free and don't like the music that much anymore anyway. That disc was mailed to me, from to me, a foreign country since I live in the US, if that makes a difference. Discs that contain software on them, whether they are CD ROMs or DVD ROMs seem to read fine. I did try out a commercially made DVD(a movie) while it played it didn't play clean. That's just due to my computer probably not having enough RAM(only 1000MB), although I do have a pair of Athlon x64 Dual Core processors in it, or probaly a very good codec for DVDs, it's a CyberPower(?) codec.
I'll mention that have read all about optical discs suffering from "bronzing" and "laser rot". I'm sure the CDs I'm having trouble with haven't underwent bronzing, when I hold the CDs up to light at the right angle they don't have that goldish-brown coloration that's indicative of bronzing. Laser rot I can't be sure of. But maybe it's what that DataPro CD-R suffered from. I heard that CDs that undergo laser rot the tracks will have a staticy noise to them.
I'll mention that Device Manager says that the drive is functioning properly.
Like I said it could be the cigarette smoke. All the tar, ashes and other gunk could be building up on the lens and other parts. But if the drive was sealed well at all I don't see how that much smoke could get in there. Cigarette smoke hasn't had a negative effect on my DVD player to my TV, PS3 or my old PS2. I smoke just as heavily around my computer as I do in my living room.
I'll also mention that I'm a victim of occasional power outages, where the power goes out and comes back on all in the same second. The outages are always caused by a transformer going out somwhere. I keep my computer plugged into a power strip, I'm not sure about if it was sold as an actual surge suppressor, it was long ago that I bought it. I'm thinking that maybe these outages are partially screwing with the power states in my computer. After one of them my computer seems to boot up alot slower than it used to when I have to resart it after updating software or after the power comes back on after an outage. The outages could've played with how power gets to the optical drive and shorted or browned out the cables making the drive suffer occasional "voltage sags".