Windows freeze

My computer used to crash almost daily after being idle, and I was able to fix that. Now My computer seems to freeze about once a day after being idle for awhile. I usually get back to the computer after it has been idle for awhile, and it won't let me open any new programs. I try to open task manager and it doesn't let me do that either. I am able to shut down the computer, and when I turn it back on it works fine. Still this is annoying. The last time it happened this is what my event viewer looked like.

Log Name: System
Source: Microsoft-Windows-Kernel-PnP
Date: 3/4/2010 5:26:44 PM
Event ID: 219
Task Category: (212)
Level: Warning
Keywords:
User: SYSTEM
Computer: Tom-VAIO
Description:
The driver \Driver\WUDFRd failed to load for the device WpdBusEnumRoot\UMB\2&37c186b&2&STORAGE#VOLUME#_??_RIMSPCI#DISK&VEN_RICOH&PROD_MEMORYSTICKSTORAGE&REV _1.00#MS0001#.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Kernel-PnP" Guid="{9C205A39-1250-487D-ABD7-E831C6290539}" />
<EventID>219</EventID>
<Version>0</Version>
<Level>3</Level>
<Task>212</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000000</Keywords>
<TimeCreated SystemTime="2010-03-04T22:26:44.003688400Z" />
<EventRecordID>32049</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="56" />
<Channel>System</Channel>
<Computer>Tom-VAIO</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="DriverNameLength">113</Data>
<Data Name="DriverName">WpdBusEnumRoot\UMB\2&amp;37c186b&amp;2&amp;STORAGE#VOLUME#_??_RIMSPCI#DISK&amp;VEN _RICOH&amp;PROD_MEMORYSTICKSTORAGE&amp;REV_1.00#MS0001#</Data>
<Data Name="Status">3221226341</Data>
<Data Name="FailureNameLength">14</Data>
<Data Name="FailureName">\Driver\WUDFRd</Data>
<Data Name="Version">0</Data>
</EventData>
</Event>

Log Name: System
Source: volmgr
Date: 3/4/2010 5:26:01 PM
Event ID: 46
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: Tom-VAIO
Description:
Crash dump initialization failed!
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="volmgr" />
<EventID Qualifiers="49156">46</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2010-03-04T22:26:01.516433400Z" />
<EventRecordID>31972</EventRecordID>
<Channel>System</Channel>
<Computer>Tom-VAIO</Computer>
<Security />
</System>
<EventData>
<Data>\Device\HarddiskVolume3</Data>
<Binary>0000000001000000000000002E0004C001100000010000C000000000000000000000000000000000</Binary>
</EventData>
</Event>

Log Name: System
Source: volmgr
Date: 3/4/2010 5:25:49 PM
Event ID: 46
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: Tom-VAIO
Description:
Crash dump initialization failed!
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="volmgr" />
<EventID Qualifiers="49156">46</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2010-03-04T22:25:49.800812800Z" />
<EventRecordID>31965</EventRecordID>
<Channel>System</Channel>
<Computer>Tom-VAIO</Computer>
<Security />
</System>
<EventData>
<Data>\Device\HarddiskVolume3</Data>
<Binary>0000000001000000000000002E0004C001100000010000C000000000000000000000000000000000</Binary>
</EventData>
</Event>

Log Name: System
Source: Microsoft-Windows-WLAN-AutoConfig
Date: 3/4/2010 5:24:22 PM
Event ID: 4001
Task Category: None
Level: Warning
Keywords:
User: SYSTEM
Computer: Tom-VAIO
Description:
WLAN AutoConfig service has successfully stopped.

Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-WLAN-AutoConfig" Guid="{9580D7DD-0379-4658-9870-D5BE7D52D6DE}" />
<EventID>4001</EventID>
<Version>0</Version>
<Level>3</Level>
<Task>0</Task>
<Opcode>2</Opcode>
<Keywords>0x4000000000000000</Keywords>
<TimeCreated SystemTime="2010-03-04T22:24:22.044217700Z" />
<EventRecordID>31958</EventRecordID>
<Correlation />
<Execution ProcessID="952" ThreadID="128844" />
<Channel>System</Channel>
<Computer>Tom-VAIO</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
</EventData>
</Event>

Log Name: System
Source: Disk
Date: 3/4/2010 5:22:30 PM
Event ID: 11
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: Tom-VAIO
Description:
The driver detected a controller error on \Device\Harddisk3\DR5.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Disk" />
<EventID Qualifiers="49156">11</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2010-03-04T22:22:30.725699200Z" />
<EventRecordID>31904</EventRecordID>
<Channel>System</Channel>
<Computer>Tom-VAIO</Computer>
<Security />
</System>
<EventData>
<Data>\Device\Harddisk3\DR5</Data>
<Binary>0E00800001000000000000000B0004C003010000000000000000000000082D00000000000000000001745C000000 0000FFFFFFFF0600000058000000000000000000061208000010000000003C000000000000000000000040235B0C80FAFFFF 000000000000000030D86D0C80FAFFFF00000000000000000000000000000000000000000000000000000000000000000000 00000000000000000000000000000000000000000000</Binary>
</EventData>
</Event>

Log Name: System
Source: Microsoft-Windows-Kernel-PnP
Date: 3/4/2010 5:26:44 PM
Event ID: 219
Task Category: (212)
Windows Driver Foundation = FailureName \Driver\WUDFRd ---WpdBusEnumRoot\UMB\2&37c186b&0&STORAGE#VOLUME#_??_USBSTOR#DISK&VEN_FLASH&PROD_DRIVE_AU_USB20&REV_8.0 7#Q5H88IPKYFROLCQT4YKS&0#
Error is caused by Windows Driver Foundation - User-mode Driver Framework "Service" being disabled or will load sometime in manual, should be automatic.


Log Name: System
Source: Microsoft-Windows-WLAN-AutoConfig
Date: 3/4/2010 5:24:22 PM
Event ID: 4001
Task Category: None
Level: Warning
Keywords:
User: SYSTEM
Computer: Tom-VAIO
Description:
WLAN AutoConfig service has successfully stopped. This is normal, happens when
you shut down or restart the PC, your internet is stopping.
,