Lync starts up fine, but when I click a contact or receive a message, Lync crashes

I already updated and repaired office.

I do have office 2010 and 2013 installed, but 2010 doesn't have Lync so there shouldn't be a conflict there.

Event logs:

Log Name:      Application
Source:        Application Error
Date:          16/10/2014 11:40:51
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      TSS-DXCSJX1.teu.tomra.corp
Description:
Faulting application name: lync.exe, version: 15.0.4659.1001, time stamp: 0x5423b435
Faulting module name: lync.exe, version: 15.0.4659.1001, time stamp: 0x5423b435
Exception code: 0xc0000005
Fault offset: 0x00e70000
Faulting process id: 0x1740
Faulting application start time: 0x01cfe9254143f6df
Faulting application path: C:\Program Files (x86)\Microsoft Office\Office15\lync.exe
Faulting module path: C:\Program Files (x86)\Microsoft Office\Office15\lync.exe
Report Id: 83b07477-5518-11e4-bdc0-005056c00008
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Application Error" />
    <EventID Qualifiers="0">1000</EventID>
    <Level>2</Level>
    <Task>100</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2014-10-16T09:40:51.000000000Z" />
    <EventRecordID>104534</EventRecordID>
    <Channel>Application</Channel>
    <Computer>TSS-DXCSJX1.teu.tomra.corp</Computer>
    <Security />
  </System>
  <EventData>
    <Data>lync.exe</Data>
    <Data>15.0.4659.1001</Data>
    <Data>5423b435</Data>
    <Data>lync.exe</Data>
    <Data>15.0.4659.1001</Data>
    <Data>5423b435</Data>
    <Data>c0000005</Data>
    <Data>00e70000</Data>
    <Data>1740</Data>
    <Data>01cfe9254143f6df</Data>
    <Data>C:\Program Files (x86)\Microsoft Office\Office15\lync.exe</Data>
    <Data>C:\Program Files (x86)\Microsoft Office\Office15\lync.exe</Data>
    <Data>83b07477-5518-11e4-bdc0-005056c00008</Data>
  </EventData>
</Event>

Same error here. I just had to re-install windows so it installed a good 300+ updates and no way to know which one could have been the culprit. 

Alexander, do you know what update (KBXXXXXXX) you recently installed? 

Here is my error:

Activation context generation failed for "C:\Program Files (x86)\Microsoft Office\Office15\lync.exe.Manifest".Error in manifest or policy file "C:\Program Files (x86)\Microsoft Office\Office15\UccApi.DLL" on line 1. Component identity found in manifest does not match the identity of the component requested. Reference is UccApi,processorArchitecture="AMD64",type="win32",version="15.0.0.0". Definition is UccApi,processorArchitecture="x86",type="win32",version="15.0.0.0". Please use sxstrace.exe for detailed diagnosis.

System

- Provider [ Name] SideBySide

- EventID 35 [ Qualifiers] 49409

Level 2

Task 0

Keywords 0x80000000000000

- TimeCreated [ SystemTime] 2014-10-17T13:55:56.000000000Z

EventRecordID 3786

Channel Application

Computer SERVECIG

Security

-

EventData

UccApi,processorArchitecture="AMD64",type="win32",version="15.0.0.0"

UccApi,processorArchitecture="x86",type="win32",version="15.0.0.0"

C:\Program Files (x86)\Microsoft Office\Office15\lync.exe.Manifest

C:\Program Files (x86)\Microsoft Office\Office15\UccApi.DLL

1

Should be one of these :

https://social.technet.microsoft.com/Forums/getfile/546013

(to lazy to type all those :o) )

• Edited by AlexanderAl Friday, October 17, 2014 11:34 PM

I had the exact same problem. Uninstalling kb2889929 fixed it for me.   It looks like that patch installs a 32-bit version of UccApi.DLL on a 64-bit system.

• Marked as answer by AlexanderAl Saturday, October 18, 2014 4:02 PM

Yep, Uninstalling kb2889929 fixed it for me as well.

Thanks Karl

I have tried uninstalling kb2889929 and running a repair on Lync but am still getting application hangs and the sidebyside error.

I found another two instances of kb2889929 installed also and uninstalled but no luck.

It is different on separate machines as on one it will just crash lync and then you can restart but on another it crashes lync but the process hangs and can't be killed via task manager (never seen that before) so you have to reboot before you can use lync again.

• Edited by James_w1 Thursday, October 30, 2014 5:35 AM

I had this same "SideBySide" error that caused Lync 2013 to crash every time it was launched. It also caused Outlook 2013 to crash due to the Lync calendar-syncing plugin.

Performing a "repair" of Microsoft Office Professional Plus 2013 fixed it for me:

1. Go to Control Panel
2. Uninstall a program
3. Microsoft Office Professional Plus 2013
4. Click "Change" button
5. Select Repair
6. Reboot the PC

I had this same "SideBySide" error that caused Lync 2013 to crash every time it was launched. It also caused Outlook 2013 to crash due to the Lync calendar-syncing plugin.

Performing a "repair" of Microsoft Office Professional Plus 2013 fixed it for me:

1. Go to Control Panel
2. Uninstall a program
3. Microsoft Office Professional Plus 2013
4. Click "Change" button
5. Select Repair
6. Reboot the PC

You.  I like you.  That fixed it!  So many times I forget the simple solutions.

Thanks