hey i got that error UNMOUNTABLE_BOOT_VOLUME with the blue screen when i boot up windows. Last thing i did was defrag my pc then it had an said the defrag app had an error and it shut off my pc and now i have the U_B_V error. I have used the recovery console and did chkdsk /r, chkdsk /p, and fixboot and none of those have done anything. Right now i am running Ubuntu linux off of a CD. Please help me and thank you in advance!