I use PGP WholeDisk Encryption (9.10) on my Windows Vista PC. I would like to use defraggler (as i do on other PC's) but am really worried about the drefraggler corrupting the disk.
PGP put a warning about third party defraggers saying that there is an important file that should not be moved. Here is the issue and resolution:
Issue
After defragmenting a PGP Whole Disk encrypted boot volume with a third-party disk defragmenter (i.e. not the Microsoft Disk Defragmenter), the computer will no longer boot into Windows. Instead, the computer boots to the black "bootguard" screen (that d