Hello,
Just now I got the same error as you did while installing a new package
with
the Package Manager:
---
MiKTeX Problem Report
Message: Windows API error 87: The parameter is incorrect.

Data:
C:\ProgramData\MiKTeX\2.8\miktex\config\1567d83d412396067c84a669e65114a0.fndb
---

While googling for a solution I found your post, without a solution :(, I
know this answer won't help you but for the sake of future people googling
for a solution to this problem:

It turns out the problem was, I had an instance of MikTex open which was
blocking the files needed for the install. After I closed the MikTex
instance the install worked fine. 
Greetings,
Marius


Till Fischer wrote:
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Hi there,
> 
> this is my first post to this list, and i suspect it to be redundant and
> already answered, but somehow I can't access the archives. Sourceforge
> tells me
> 
>> Your mailing list, miktex-users, appears to be either not archived yet,
>> or has had no e-mails sent to it. If it is a new list, please wait 2-4
>> hours after the first message is sent for the archive to show up. 
> 
> Now to the problem:
> 
> I try to update miktex, but after downloading it always fails with the
> following error: "Error: Windows API error 87: The parameter is
> incorrect."
> 
> The line before (from the log) reads: "extracting files from
> bidi.tar.lzma..."
> 
> I hope you have a solution to this problem,
> kind regards,
> Till
> 
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>
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