RunTests.bat fails all tests after restart on AMD64

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What steps will reproduce the problem?

1. Run RunTests.bat and see that tests are successful.
2. Restart.
3. RunTests.bat fails all tests.
4. In directory AutoItLibrary-1.1 run 'python setup.py install'.
5. RunTests.bat succeeds.

What is the expected output? What do you see instead?

I expect RunTests.bat to succeed after a restart, but it fails.  In my own 
tests I see messages about AutoItLibrary keywords not found.

What version of the product are you using? On what operating system?

AutoItLibraray 1.1 on Windows Server 2008 R2.

Please provide any additional information below.

I suspect that this is related to AMD64 platform in general, not specifically 
Windows Server 2008 R2.

Original issue reported on code.google.com by [e-mail] on 21 Mar 2011 at 1:35

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I can confirm this error occured on my Virtual Box Windows 7 Release: 6.1.7601
Service Pack: 1

Emulated Processor is a AMD Athlon(tm) X2 260, 3 GHz.

After reinstall keywords are detected again.

Original comment by [e-mail] on 16 Sep 2014 at 12:24