Hmm...appears either a disk sector is damaged, or Bootkit Remover cannot read the first sector of the hard disk.
Nonetheless, let's take a look at the kernel.
Download Kernel Detective:
http://www.kernelmode.info/ARKs/Kernel_Detective_v1.3.1.zipExtract the file to your Desktop.
Enter the folder and double-click on Kernel Detective.exe to get started.
We need four different logs, to be uploaded.
Click on Kernel Modifications tab, then click on File > Save Current List, and give it a name. The name should be in *.txt format.
Save the log to your Desktop.
Do the same for the Drivers tab, System Service Descriptor Table, and the System Service Descriptor Table Shadow.
Attach all the logs to your next reply.