I believe i'm having some hard drive issues but not for sure. my computer is a home build running windows 7, asus mother board with amd cpu. using Microsoft security essentials for antivirus and fire wall. originally I had a problem with the computer not booting and at the time I couldn't stop to figure it out myself. took it to a local shop that I have used several times. they got it up and going but informed me the hard drive had bad clusters/ sectors. since then I haven't had any problems with it booting up but it will not let me down load anything, not even windows updates, get error code 9c47. I've tried disabling security and fire wall but still no-go on downloads. I have run chkdsk but I didn't see any obvious problems there, but i'm no expert. right now i'm running sfc/scannow and so far it does show corrupted files that can't be repaired. well, that's my problem. thanks for any and all advice.