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Error message when trying to enable BitLocker under Vista

Symptoms

When you try to enable BitLocker Drive Encryption on an IBM portable computer that is running Windows Vista, you may receive the following error message:

 

Insufficient disk space for BitLocker Drive Encryption to encrypt the drive. Use disk maintenance tools to repair the disk and try again.

Diagnosis

Applicable for IBM or Lenovo systems running Windows Vista 

Solution

 

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

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