auto or manually update the alpha snap, and download the file. Select install, in my case this is a portable version., so a portable install is what it should do. And respond to the prompts as normal.### Steps to reproduce:

Actual behavior:

It loads in, and then fails to create the portable version with an error, leaving you in the temporary running new snapshot.
The log error is:
entering wx application main loop
ERROR - gui.installerGui.doCreatePortable (09:47:32.418) - MainThread
(4576):
Failed to create portable copy
Traceback (most recent call last):
File "gui\installerGui.pyc", line 359, in doCreatePortable
File "gui_init_.pyc", line 900, in init
File "threading.pyc", line 1077, in name
AssertionError: Thread.init() not called
IO - speech.speak (09:47:32.444) - MainThread (4576):
Speaking [LangChangeCommand ('en_GB'), 'Desktop list']

Expected behavior:

It should update and run after the update after a prompt to say it was successful

System configuration

Windows 7 64 pro

NVDA installed/portable/running from source:

Portable

NVDA version:

INFO - main (09:59:12.267) - MainThread (1044):
Starting NVDA version alpha-18737,e9cfa1b1

That is the one downloaded.
Originally running an alpha snap...
INFO - main (10:16:05.256):
Starting NVDA version alpha-18699,0e4bb4ad

Windows version:

7 64 pro

Name and version of other software in use when reproducing the issue:

None

Other information about your system:

8gig ram four core processor etc

Other questions

Does the issue still occur after restarting your PC?

Yes

Have you tried any other versions of NVDA? If so, please report their behaviors.

Well as its on install, no.