Hi Wes,

You've just found the problem - Thank you.

The 'Compact' command doesn't work.

It fails with the error:

"The filesystem does not support compression or the cluster size is larger
than 4096 bytes"

When I run chkdsk: The drive has 16K Clusters.

Using Paragon's Hard Disk Manager, I reduced the Cluster Size to 4KB: This
fixed the problem.

The 'Advanced Button' has returned, as has the C: Drive Compress CheckBox.

Thank you for all your help - If you hadn't asked me to try the 'Compact'
command, I've no idea how long it would have taken me to fix the issue.

Once again Wes, many thanks.

Colin

"Wesley Vogel" wrote in message
...
| 1. Open My Computer.
| 2. Right-click the drive you want to compress.
| 3. Click Properties.
| 4. On the General tab, select the Compress drive to save disk space check
| box, and then click OK.
| 5. In Confirm Attribute Changes, select the option you want.
|
| Compress drive to save disk space
| [[Specifies that this NTFS drive be compressed. By default, only files in
| the root directory are compressed automatically. To have Windows compress
| all folders on this drive, select the Also compress subfolders check box
in
| the message that appears.]]
|
| --
| Hope this helps. Let us know.
|
| Wes
| MS-MVP Windows Shell/User
|
| In ,
| News Group hunted and pecked:
| Hi,
|
| I have a single HDD with several NTFS Partitions: C: D: E: etc.
|
| C: is my System partition - XP Home SP2.
|
| I can compress files (i.e.. the 'Advanced' Button is available) on all
| Partitions except C:
|
| C: is NTFS as are all other Partitions - How do I get the 'Advanced'
| Button back?
|
| Any help appreciated.
|
| Thanks,
|
| Colin
|