36950: Acronis Backup 11.7/11.5: Reboot Is Required after Installation on Windows XP

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Last update: 30-04-2021

After installation of Acronis Backup onto Windows XP a reboot is mandatory.


After installation of Acronis Backup onto Windows XP (any edition which meets system requirements), a reboot is mandatory.


The reboot necessity is caused by changing the IRPStackSize parameter in the registry of Windows XP in order to make Acronis file system drivers function correctly.

IRPStackSize is located in the following registry key:


More information

For more information about IRPStackSize parameter in Windows, see: Description of the IRPStackSize parameter in Windows 2000, in Windows XP, and in Windows Server 2003.