Description
Microsoft released a security update on January 3, 2018 to insure compatibility of a Windows updates related to CPU security flaw (Meltdown) with anti-virus software products (see Microsoft Security Bulletin
KB4072699).
Fortinet tested the latest active FortiClient software versions 5.4.4 and 5.6.3 and found them fully compatible with Microsoft's January 2018 Security Update.
It safe to use these versions with the security update.
Solution
Microsoft requires that the following registry key exist on all compatible systems, even if there is no AV product installed:
Key="HKEY_LOCAL_MACHINE"Subkey="SOFTWARE\Microsoft\Windows\CurrentVersion\QualityCompat"
Value Name="cadca5fe-87d3-4b96-b7fb-a231484277cc"
Type="REG_DWORD”
Data="0x00000000”
With the latest active FortiClient versions 5.4.4 and 5.6.3, it will be required to add this key manually, or using Group Policy, in order to receive the January 3, 2018 security update.
Fortinet will release new versions of FortiClient prior to January 9, which will add the required registry key automatically.
