I'm fairly new to Macs (have had my iMac since Apr 2009), and am trying to troubleshoot a driver conflict. I'm afraid I don't know enough keywords to make an effective search, so I thought I'd come see if anyone could point me in the right direction. I'm a fairly competent Windows user (more than 15 years tinkering and more than a decade running a home network of two to five machines), and this switching to Mac has definitely humbled me, as these OS's are set up so differently. A while back (4-6 weeks) I came across my sd card reader (no-name brand from Amazon that had been misplaced since before the Mac was purchased), and plugged it into one of the USB ports on my Apple keyboard. After that, I started having problems. I don't know if they're all related or not, so here they are. 1) Startup slowed down at first, and has continued to get slower and stranger. Now I can't use the option key to bring up the bootable drives (so no more Boot Camp for me until this is fixed), and in order to boot into OSX, I have to unplug ALL peripherals, including my keyboard and mouse. 2) My DVD drive died. I tried watching a new DVD, and it spit it back out at me a few times before NOT spitting it out again. After that, no dvds would work, and it stopped ejecting altogether. (I finally got it to give up the last one I put in (a sacrificial disc), but only after a lot of time and hassle to get it to think that it had ejected, and then fishing it out with a paperclip.) Now the dvd drive doesn't even show in the hardware device list. Since Apple's DVD player won't recognize an external drive (this really bugs me, btw . . . it works on my husband's MacBook Air--why not on my iMac?), I'm really bummed that I no longer have *any* kind of removable media, and can't get data from dvds or cds. If I need to reinstall, I'm going to have to figure out how to boot from a jump drive (don't worry, I think I have one that won't mess with anything--I hope). Currently, it'll boot up just fine in safe mode, so now I'm on the hunt for the rude drivers that are messing with my happiness. ;o) Fwiw, here's what I've got installed that is loaded on startup: BackBlaze Growl MacFuse Flip4Mac WMV SteerMouse There aren't any items in my Startup Items folders, and none of the folders that seem like they should contain drivers seem to have anything shady in them. Soooo . . . what's next? Thanks so much for helping a greeny out . . . and happy T-Day!