Win 8.1 install - programs open then crash right away

Installed win 8.1 preview smoothly last night. Now I'm having problems. Certain programs like File Manager (!), Photoshop crash upon opening. Chrome works, but if I right click on a link, the dialogue box opens then crashes the program. Here's the error report, wondering if its a video drive error:

Log Name: Application
Source: Application Error
Date: 6/29/2013 9:38:57 AM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer:
Description:
Faulting application name: Photoshop.exe, version: 14.0.0.0, time stamp: 0x5176451b
Faulting module name: dlnashext.dll, version: 12.0.9431.0, time stamp: 0x51bcfb3d
Exception code: 0xc0000005
Fault offset: 0x000000000000d56c
Faulting process id: 0x83c
Faulting application start time: 0x01ce7465df0825b6
Faulting application path: C:\Program Files\Adobe\Adobe Photoshop CC (64 Bit)\Photoshop.exe
Faulting module path: C:\Windows\System32\dlnashext.dll
Report Id: a9bbfe75-e05c-11e2-9b21-0026832cc03e
Faulting package full name:
Faulting package-relative application ID:
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="2013-06-29T01:38:57.000000000Z" />
<EventRecordID>1256</EventRecordID>
<Channel>Application</Channel>
<Computer>JASONWIN8</Computer>
<Security />
</System>
<EventData>
<Data>Photoshop.exe</Data>
<Data>14.0.0.0</Data>
<Data>5176451b</Data>
<Data>dlnashext.dll</Data>
<Data>12.0.9431.0</Data>
<Data>51bcfb3d</Data>
<Data>c0000005</Data>
<Data>000000000000d56c</Data>
<Data>83c</Data>
<Data>01ce7465df0825b6</Data>
<Data>C:\Program Files\Adobe\Adobe Photoshop CC (64 Bit)\Photoshop.exe</Data>
<Data>C:\Windows\System32\dlnashext.dll</Data>
<Data>a9bbfe75-e05c-11e2-9b21-0026832cc03e</Data>

Anyone else having this problem?