Exchange Server 2010 SP2 Rollup 6 error: make sure enough disk space is available KB2746164

When you install Rollup 6 for Microsoft Exchange Server 2010 SP2, you can again meet with well-known problem that has performed well for Rollup 4 and Rollup 5.


However, in the latest version that is updated Rollup 6 generates a new error message:



When setup wizard checks for system requirement you can get error:

“…Check to make sure enough disk space is available….”

Of course, after checking the amount of free space on the server, it appears that there is quite a lot, so what caused this error?

As usual, the problem are installed updates:

  • KB2506143 – for Windows 7 SP1 and Windows Server 2008 R2 SP1
  • KB2506146 – for Windows Server 2008 SP2


We have already written about them many times and the problems they caused during the installation of Rollup 4 and Rollup 5 for Exchange Server 2010 SP2.

However, this time we write about them again because of the new specific error message about the problem when you install Rollup 6 for Exchange 2010 SP2.

Of course, there is one solution:

uninstall both updates and re-install Rollup 6