I decrypted my hard drive after encrypting it with bitlocker, however now I can’t seem to encrypt my hard drive with Bitlocker again.

If you have not changed your partitioning scheme since you unencrypted the drive it is probalby just a matter of no contiguous disk space. I ran into the same thing. To solve it I defragmented the drive (righ-click the drive, select properties, click tools) and deleted a few files I did not need any more. BitLocker hogs a lot of disk space when it first encrypts, and it does not seem very elegant about selecting it across randomly spaced free space.
How come you decrypted the drive anyway?
"David N" wrote:

Sorry I forgot to mention that the error it gives is that there is insufficient disk space for bitlocker to encrypt the drive, however I have over half of my hard drive free and my disks are partitioned correctly.
"David N" wrote:

Thank you for your help however I have deleted most of my files, uninstalled most of my programs and bitlocker still won’t enable it keeps saying that there is insufficient disk space. The command line defrag utility says that I have 0% fragmentation of my hard drive, and that the largest extent of free space on my hard drive is 12.31GB with the average free space extent being 4MB, does the largest free space extent have to be equal to the amount of space used on the hard drive perhaps? I decrypted the hard drive in the first place so that I could repartition it however the utility I was using wouldn’t work.
"Jesper" wrote:

When I did it I had to free up 13 GB before it would encrypt. I don't think you have to have half the drive free, but you may need more. Run a defragmentation pass and see what happens.

Okay, I have run a defragmentation pass, and was able to get the largest free space extent up to 24.19GB, but it still won't encrypt. Currently I am using 16.74GB of my hard drive.
"Jesper" wrote:

En news:9143E9AF-E300-4BAA-80B7-39FDD3985094 microsoft.com, David N va escriure:

How much free in the "boot" volume (the one where Bootmgr is, not the one where Windows directory is)?
Antoine

1.42GB are free on the boot volume with the largest free space extent being 750MB, and the average free space extent being 364MB.
"Antoine Leca" wrote:

"David N"

There have been successes reported by people who have the same error, and then defragment their hard drives.
BitLocker is apparently looking for _contiguous_ free space, for some reason I can't imagine at.
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Okay I have tried defragmenting my hard drive, and I have 28.23GB contiguous free space. However bitlocker still won't enable. Any idea how much contiguous free space is Needed? "alun texis.invalid" wrote: