Update Stopped Saying That There Was A Corrupt File On It

I'm running Vista on a Sony Vaio purchased new in 9/08. I have never had any problems until this morning. My husband used my pc this morning to go to Tax Brain, and on his log on there was a Adobe Update ready to download. When I went to log him off, I decided to download the update; then the update stopped saying that there was a corrupt file on it. So I logged off his side and signed into mine (btw, he has NO adminitrative rights), I then tried to open my Windows Live Mail...it then prompted me for a password, which it NEVER does because it's already saved. Then another alert came up that a file in live mail was corrupt; I freaked out and tried to access Norton (which is up to date) and it wouldn't let me. Next thing I know a blue screen comes up and says that windows is to be shut down to prevent damage; it suggested I restart the computer and try to open in safe mode and determine what files may be at fault. {Incidentally, yesterday Norton detected "Backdoor.Trojan" or something of that nature; I looked up the detail report and it said that it was blocked and fully removed from my system, and I was ablel to use the pc until 9pm with no problem - after booting up this morning is when the trouble began.} Ok, so I tried rebooting in each and every mode available on that inital error screen. The rebooting goes down all the drivers until it gets to crcdisk.sys...then it quits and gives me that damn blue screen again that advises me to try rebooting in safe mode. I cannot reboot at all.

Now, I have downloaded an iso file of Vista recovery to my thumb drive using the tutorial on this site; and I have plugged it into the pc upon startup...with same result as before. Nothing. I am not able to burn a DVD because the old laptop I'm on right now only has a CD-R and a DVD-Rom. I don't have any blank CD's here and my husband is at work; we're pressed for cash also...so I'm pretty screwed all the way around. To make matters worse, I have an assignment and my finals (I'm finishing school at 31) due today, tomorrow and this weekend. I don't have a vista recovery cd, none was provided when i bought my pc. And now i have absolutely no idea what to do.