UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0

Steps to reproduce the problem:
1. launch canary from taskbar icon, no window appears
2. check task manager, 2, sometimes 3 chrome.exe instances running

What is the expected behavior?
Canary window to open

What went wrong?
## with -diagnostics flag i get "[FAIL] local state integrity file too big" in the cmd window, screenshot:
http://i.imgur.com/y0AdZl9.png

## "C:\Users\(windows user name)\AppData\Local\Google\Chrome SxS\Application\debug.log" gives:
[0623/104806.084:ERROR:process_reader_win.cc(123)] NtOpenThread: {Access Denied} A process has requested access to an object, but has not been granted those access rights.  (0xc0000022)
[0623/104806.084:ERROR:exception_snapshot_win.cc(87)] thread ID 18676 not found in process
[0623/104806.084:WARNING:crash_report_exception_handler.cc(62)] ProcessSnapshotWin::Initialize failed

## deleting the "C:\Users\(windows user name)\AppData\Local\Google\Chrome SxS\User Data" folder allows canary to launch, once.  Closing the browser (after checking that no chrome.exe instances are seen in task manager) and clicking the taskbar icon to launch again fails in the same way as with my old "User Data" folder.

Crashed report ID: 

How much crashed? Whole browser

Is it a problem with a plugin? No 

Did this work before? Yes not sure, whatever came before 61.0.3139.0 worked - yesterday it was fine

Chrome version: 61.0.3139.0 (Official Build) canary (64-bit)  Channel: canary
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: Shockwave Flash 26.0 r0