Hi, I am using Vista Ultimate and am using a USB flashdrive to BitLocker my C: When Vista runs the BitLocker System Check, it returns with the error: "Insufficient disk space for BitLocker Drive Encryption to encrypt the drive. Use disk maintenance tools to repair the disk and try again" But the message doesn't say how much space is needed, not what kind of space is needed (e.g. contiguous?), or on which partition. so I don't know how to solve it. My config is as follows: C: (name: SYSTEM) 52.34GB Free: 23.26GB Boot, Page File, Crash Dump, Primary Partition D: (name: DATA) 20.18GB Free 7.21GB Primary Partition S: (name: BOOT) 2.00GB Free: 1.95GB System, Active, Primary Partition Ihave already run Vista error-checking several times, and the Vista Disk Defragmenter several times. I even ran PowerDefragmenter with Contig.exe several times, but to no avail. Appreciate any help. My Vista defrag analysis results are: C:\Windows\system32>defrag c: -a -vWindows Disk DefragmenterCopyright (c) 2006 Microsoft Corp. Analysis report for volume C: SYSTEM Volume size = 52.34 GB Cluster size = 4 KB Used space = 28.97 GB Free space = 23.37 GB Percent free space = 44 % File fragmentation Percent file fragmentation = 0 % Total movable files = 78,894 Average file size = 297 KB Total fragmented files = 17 Total excess fragments = 37 Average fragments per file = 1.00 Total unmovable files = 71 Free space fragmentation Free space = 23.37 GB Total free space extent = 7,812 Average free space per extent = 3 MB Largest free space extent = 6.87 GB Folder fragmentation Total folders = 10,744 Fragmented folders = 1 Excess folder fragments = 0 Master File Table (MFT) fragmentation Total MFT size = 88 MB MFT record count = 79,128 Percent MFT in use = 87 Total MFT fragments = 3 Note: On NTFS volumes, file fragments larger than 64MB are not included in the fragmentation statistics You do not need to defragment this volume. Thank you, Jonathan Goh Singapore

Try the following: 1. Click Start, type regedit in the Start Search box, and then click regedit in the Programs list. 2. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management 3. Verify the data type of the PagingFiles registry entry. If the data type is REG_SZ, follow these steps: a. Note the value data for the PagingFiles registry entry. b. Back up the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management c. Right-click PagingFiles, and then click Delete. d. Click Yes when you are prompted. e. On the Edit menu, point to New, and then click Multi-String Value (REG_MULTI_SZ). f. Type PagingFiles, and then press ENTER. g. On the Edit menu, click Modify. h. In the Value data box, type the value data that you noted in step 3a, and then click OK. i. Exit Registry Editor. 4. Restart the computer.