Event 7001, Service Control Manager: Server service failed to start when dependency service or group failed to start

Computer w new Windows 7 pro install freezes several times a day. Seems to happen when when using internet explorer. After hard shutdown, on restart, works fine for an hour or so, then freezes again.  Each time event viewer says:

"Event 7001, Service Control Manager"
"The Computer Browser service depends on the Server service which failed to start because of the following error:
The dependency service or group failed to start "

Details Tab says:
- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
  <Provider Name="Service Control Manager" Guid="{555908d1-a6d7-4695-8e1e-26931d2012f4}" EventSourceName="Service Control Manager" />
  <EventID Qualifiers="49152">7001</EventID>
  <Version>0</Version>
  <Level>2</Level>
  <Task>0</Task>
  <Opcode>0</Opcode>
  <Keywords>0x8080000000000000</Keywords>
  <TimeCreated SystemTime="2012-03-21T20:50:18.367200000Z" />
  <EventRecordID>8003</EventRecordID>
  <Correlation />
  <Execution ProcessID="528" ThreadID="1540" />
  <Channel>System</Channel>
  <Computer>Treehouse</Computer>
  <Security />
  </System>
- <EventData>
  <Data Name="param1">Computer Browser</Data>
  <Data Name="param2">Server</Data>
  <Data Name="param3">%%1068</Data>
  </EventData>
  </Event>

I really need help with this. Until today did not even know I had a Service Control Manager. Hope I have at least selected the correct tags? Thanks. Olivia