Resolving Long Application Launch Times in App-V 5

The application takes a super long time to launch (CPU is running at full power).
Procmon shows some odd behaviour, the app is seemingly enumerating and scanning all of the keys under HKCR\CLSID or HKCR\Wow6432Node\CLSID

Setting the CLSID key to override inside the package solves the issue, as then it can only see the very small number of GUIDs captured in your package, which it can enumerate very quickly. The potential downside of course is if your application needs to access any COM classes from the base OS, it may be unable to find them.

(Thanks to Dan Gough –

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