I, too, am experiencing this problem and have been unable to resolve the issue.

"CloudySeattle" wrote:

> Unfortunately, I'm experiencing the same problem. My IT guy says it's
> common, and of course MSFT knows, has known for six months, and is offering
> no solutions. I'm going to work with him on it and will let you know if we
> find a solution. I think we need to go back to Intuit as well. In their
> high-handed way of forcing us to their new software version, they neglected
> to make it work with .NET 2.0.
>
> "Heart" wrote:
>
> > This morning I could not open Quicbooks. When I checked the Intuit web site,
> > They recommended removing and then reinstalling Microsoft .NET Framework 2.0
> > Service Pack. I have tried to remove Microsoft .NET Framework 2.0 Service
> > Pack and reinstall.
> >
> > During the removal, I got the following message:
> > Program has encountered a problem during setup.
> > Setup did not complete correctly.
> >
> > I then checked for updates. The recommended updates were both Framework 2.0
> > and 3.0. I tried downloading and installing the updates. I got the following
> > error message:
> > Error Code: 0x643
> > Try to install the update again, or request help from one of the following
> > resources.
> >
> > For self-help options:
> >
> > Frequently Asked Questions
> > Find Solutions
> > Windows Update Newsgroup
> >
> > I have worked through the first two options with no success. I am now at the
> > third. Does anyone have a recommendation on what to do next?
> >
> > --
> > Heart