msi hangs on _RemoveFilePath

[SP_]

Hi all,
on some computers my product's msi hangs for ages. Logs says:

MSI (s) (3C:A0) [17:13:57:996]: Note: 1: 2205 2: 3: BindImage
MSI (s) (3C:A0) [17:13:57:996]: Note: 1: 2205 2: 3: ProgId
MSI (s) (3C:A0) [17:13:57:996]: Note: 1: 2205 2: 3: PublishComponent
MSI (s) (3C:A0) [17:13:57:996]: Note: 1: 2205 2: 3: SelfReg
MSI (s) (3C:A0) [17:13:57:996]: Note: 1: 2205 2: 3: Extension
MSI (s) (3C:A0) [17:13:57:996]: Note: 1: 2205 2: 3: Font
MSI (s) (3C:A0) [17:13:57:996]: Note: 1: 2205 2: 3: Class
MSI (s) (3C:A0) [17:13:58:001]: Note: 1: 2205 2: 3: _RemoveFilePath

Installation has about 50 000 files and about 3 000 components. Installation Requres msi.dll version 4.5.
Any ideas?