Erratic event id 1000; Windows Explorer; MSVCR90.dll on Win7 64bit

Windows 7 64 bit. Interacting with Explorer, often as simple as switching to Explorer window and changing focus on a filename. Explorer stops working, generates ID 1000 (see below) and then restarts itself.

Recently installed LibreOffice v 3.6.1.2 and 16-bit Java 6 update 30 (which works with LibreOffice).

I suppose you are going to tell me to uninstall the LO and Java. I'm really hoping for other troubleshooting or diagnostic options. The LO and java setup is for a project of some urgency.

Log Name:      Application
Source:        Application Error
Date:          10/1/2012 8:22:51 AM
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      seagoing2012
Description:
Faulting application name: explorer.exe, version: 6.1.7601.17567, time stamp: 0x4d672ee4
Faulting module name: MSVCR90.dll, version: 9.0.30729.6161, time stamp: 0x4dace4e7
Exception code: 0xc0000417
Fault offset: 0x00000000000552d4
Faulting process id: 0x1b6c
Faulting application start time: 0x01cd9f661a148e6a
Faulting application path: C:\Windows\explorer.exe
Faulting module path: C:\Windows\WinSxS\amd64_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.6161_none_08e61857a83bc251\MSVCR90.dll
Report Id: dc88f04c-0bdb-11e2-b556-4c80939ece8c
Event Xml:
<Event xmlns=<I had to munge this line to get the message posted. Something about "no links"... >
  <System>
    <Provider Name="Application Error" />
    <EventID Qualifiers="0">1000</EventID>
    <Level>2</Level>
    <Task>100</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2012-10-01T15:22:51.000000000Z" />
    <EventRecordID>8225</EventRecordID>
    <Channel>Application</Channel>
    <Computer>seagoing2012</Computer>
    <Security />
  </System>
  <EventData>
    <Data>explorer.exe</Data>
    <Data>6.1.7601.17567</Data>
    <Data>4d672ee4</Data>
    <Data>MSVCR90.dll</Data>
    <Data>9.0.30729.6161</Data>
    <Data>4dace4e7</Data>
    <Data>c0000417</Data>
    <Data>00000000000552d4</Data>
    <Data>1b6c</Data>
    <Data>01cd9f661a148e6a</Data>
    <Data>C:\Windows\explorer.exe</Data>
    <Data>C:\Windows\WinSxS\amd64_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.6161_none_08e61857a83bc251\MSVCR90.dll</Data>
    <Data>dc88f04c-0bdb-11e2-b556-4c80939ece8c</Data>
  </EventData>
</Event>