Does anybody know what this SpySweeper Error Message Means?

I am running the current version of Webroot's SpySweeper. I am also running WinXPro SP2. I also use Norton's AV 2004 and Window's Firewall. Whenever I use SpySweeper to check my pc, I get the following Error message under the Results-Sessions Log:

 

Warning: Failed to read from disk. The request could not be performed because of an I/0 device error. Then "Warning, Failed to Read MFT Entry 65540.

 

Is anybody familiar with SpySweeper and have a clue as to why I am continuing to get this error message. I uninstalled the program, disconnected my pc from the internet and then turned off my Anti Virus program and such and then did a reinstall. Before the reinstall, I made sure all the files and folders from Webroot's SpySweeper were deleted and I rebooted the pc in between.

 

SpySweeper will run, and it will catch cookies and notify me if someone is trying to get access to my computer, but this is one problem I can't solve. I have a printer, scanner, monitor, speakers, and the receiver for the wireless mouse/keyboard hooked up to the pc. Could one of these be the problem?

I can't figure it out and I am hoping someone else can. Other than that, I receive no error messages when running SpySweeper. I've checked through the help files that came with the program. I can't find this problem in there.