Hi. I'm in the UK with a Dell XPS-8500, originally Windows 8 but upgraded (not recently) to Windows 10. I had my first Blue Screen on this PC today. Unexpected store exception. When I tried to reboot, it said no bootable device. However, when I powered down & up it did reboot. I mooched around online for general advice & downloaded Crystal Disk Info. My drive is an ST2000DM001. Crystal assessed this as caution because Current Pending Sector Count & Uncorrectable Sector Count were both 8. But the numbers keep climbing every time I run Crystal. The latest is 1,000 for both counts, still assessed as caution. In case of loose physical connection, I opened up the PC & disconnected & reconnected the cables (power to HDD & both ends of HDD to MB). It didn't help. Is it the drive & do I just need to buy a new one? Any other advice? Thanks.