Computer very slow

QUESTION:
My computer is very slow on start up and is hanging up in programs.
ANSWER:
Your system log files say the following: The device, \Device\Harddisk0\D, has a bad block. So, you need to run CheckDisk.
Go to a command prompt (Start, Run, cmd) and type the following: chkdsk /r
When you hit Enter it’ll say it can’t do it now, but can upon reboot. Go ahead and reboot and let that run. It might take an hour, but probably less.