I would appreciate any help, cause I have never had this problem before. My system I put together a year ago has been having problems for awhile, many of which I have been ignoring. The first was the onboard LAN stopped working. I had to disable it in the mb bios, and use an old network card I had laying around. The computer kept getting slower and slower (probably due to an infestation of adware I cant get rid of) so I decided to do a fresh install of win xp. I bought a new 160 gigh hard drive to expand capacity. Initially I took out the old drive and tried to install win xp on that. I booted to the cd, win xp install starts up, loads setup files, then when it says loading windows I get blue screen saying unmountable boot volume. Tried again using an xp pro copy I found, same result. I thought perhaps the probablem was I needed the sp 1 edition to load onto an extra large drive, so I created a blank ntfs partition using the western digital program. Same result trying to load windows setup. I copied all my files to the new hard drive, then I blanked my older 120 gig drive, and tried to run the install disc on that. Same thing error: unmountable boot volume. Anyone know what is going on. I thought perhaps the bios of the mb is corrupted. I dont know the model num off hand. It is an Asus board for AMD chips upto 400mhs fsb. I tried resetting the bios to default, and removing the bios battery and putting in back in to no avail. Any help will be much appreciated.