ISA 2004 Hotfix required

Hi, I hope someone can help me. I need one of two hotfixes for ISA Server 2004 SE English x86.

Either

v4.0.2167.910
KB970454 Description of the ISA Server 2004 hotfix package: June 2, 2009

Or

v4.0.2167.911
KB976289 FIX: Connections to a Web site that was published by ISA Server 2004 may fail and you receive a connection time-out error

I drew the short straw and have been transported back to when ISA 2004 was the new thing! I have been tasked to bring this ancient system up to date (Server, SQL, Exchange 2016).

The problem is that ISA isn't being used in the normal. Custom development hastaken place and this needs to be investigated. I've cloned the machine onto a development machine but ISA won't load unless I limit the processor cores to 4 but then debugging is too slow.

PLEASE HELP!!!