RE: PBR Image (Y:)
Please provide the model of your Dell and operating system when posting. Thanks.
Normally a PBR error indicates a partition problem with the hard drive. You should immediately BACK UP YOUR IMPORTANT FILES.
Next, run the Dell diagnostics or any other diagnostic utility from a bootable CD or flash drive. What you want to do is perform a thorough test of hard drive integrity. Let me know the test results.