Error 2738 stopped installation into Vista Home Premium of HP’s Scanjet G3010 software from its CD and their download, and of Channel 4’s On Demand software from their site. But it did not occur when a PC World tech guy put the CD into a similar demo computer!
I have found a good fix from James under May CTP install fails on Vista – MSDN Forums. It caused a panel RegSvr32 to say “DllRegisterServer in vbscript.dll succeeded.”. Below I describe what I did, guided by his post on May CTP install fails on Vista - MSDN Forums
First I found vbscript.dll was on C:\WINDOWS\System32. Then I went to Start -> All Programs -> Accessories -> Command Prompt and right clicked Run as administrator. Then in the Administrator Command Prompt window, I completed and entered the line C:\Windows\System32>regsvr32 vbscript.dll. Then I OKed the RegSvr32 message and both programs installed.
Channel 4 TV has fixes for their error 2738, see More in Technical Problems >
under Technical Problems
at Channel 4: Help & Support
AND after Vista's SP1 installed, HP Solution Center would not open so I uninstalled their photosmart software but had to reapply the fix for error 2738 to reinstall it.
Are two related problems with Vista and HP of interest?
Checking the security of LaserJet 1018 folder evoked "The permissions on LaserJet 1018 Drivers are incorrectly ordered, which may cause some entries to be ineffective." from Vista. Only after I set Allow a Trusted Installer to Read & execute, List folder contents and Read did the info and request messages display during installation.
And the online toolbox for the Color LaserJet 1600 has links to its readme and guide that don’t open from my Programs -> HP -> HP Color LaserJet 1600. HP Support suppose the toolbox is there too but it’s not!