Hi, A few weeks ago, my computer got a virus that posed as a security center application. I had gotten this same virus the year before and had effectively erased it, but this time I panicked a bit and shut down my computer using the power switch on the back of the case. I rebooted ready to go in and get rid of it again but when I tried to boot up my computer only made it pasted a few of the initial procedures and then went directly to a black screen with a flashing "_" at the top. I left it on for a few hours hoping it was only taking an abnormally long time to boot but it never got to me OS. Since then, I've trawled internet forums and have tried resetting the BIOS but, not being very well versed in hardware, I'm not sure what else to do. If anyone could help or give me some ideas or pointers I would be much obliged.