[markknight]

I will address the certification issue.
MS changed their policy on this right around the release of Vista. While their intentions were good, the outcome was not.

1) Certificates must now be issued by a trusted server owned by the company in question...(easy)
2) Certificates allowed to be trusted fall into a select group of authorities...(humm)
3) If either of the above does not conform, the error is seen
4) Because the installer is an EXE one would assume that is what needs to be trusted..not the case it is the SCR that is inside the EXE AND the EXE (OK)

Is Prolific willing to live with this issue? My recommendation was YES.
We do not send this to you, you come find us.
We do not post on fly-by-night software DL sites...period
Could this result in a loss of sales?
Sure. To certify this straight across the board could cost 20G or better a year.

Please understand folks, this is NOT just a Prolific issue.
Put Norton, Adobe Reader, Quickbooks (pretty big list) on a system that did not come with it originally and watch the warnings fly!
Even if it did, the warnings in Vista and XP SP3 warn you for bigger fish than us on certain upgrades.
You never saw the warning because of the OEM install.
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So you all know...
Installers, I am still learning but have been doing the custom builds for coming up on 3 years.
Certs:
A+
MCP
MCSE
MCSA
CCNA
MCDBA

Win7 is far kinder