Random restarts

Just started here lately, not sure of the cause and when the computer reboots windows 7 doesn't even say there was an error or anything but it shows up in event viewer system logs as an unexpected crash.

- System

- Provider


[ Name] EventLog


- EventID 6008


[ Qualifiers] 32768



Level 2


Task 0


Keywords 0x80000000000000

- TimeCreated


[ SystemTime] 2010-07-19T14:36:05.000000000Z



EventRecordID 31110


Channel System


Computer Lardacus-PC


Security
- EventData


10:34:11 AM


‎7/‎19/‎2010










793










DA070700010013000A0022000B009000DA070700010013000E0022000B0090003C0000003C00000000000000000000000000 0000000000000100000000000000
Binary data:

In Words
0000: 000707DA 00130001 0022000A 0090000B
0008: 000707DA 00130001 0022000E 0090000B
0010: 0000003C 0000003C 00000000 00000000
0018: 00000000 00000000 00000001 00000000

In Bytes
0000: DA 07 07 00 01 00 13 00 Ú.......
0008: 0A 00 22 00 0B 00 90 00 .."...�.
0010: DA 07 07 00 01 00 13 00 Ú.......
0018: 0E 00 22 00 0B 00 90 00 .."...�.
0020: 3C 00 00 00 3C 00 00 00 <...<...
0028: 00 00 00 00 00 00 00 00 ........
0030: 00 00 00 00 00 00 00 00 ........
0038: 01 00 00 00 00 00 00 00 ........



Got this error about 4 seconds before the restart:
Event 12, Subsys-SMSS

The crash dump file could not be created due to a lack of free space on the destination drive. Increasing the amount of free space on the destination drive may help prevent this error.
- System

- Provider


[ Name] Microsoft-Windows-Subsys-SMSS


[ Guid] {43E63DA5-41D1-4FBF-ADED-1BBED98FDD1D}



EventID 12


Version 0


Level 2


Task 0


Opcode 0


Keywords 0x4000000000000000

- TimeCreated


[ SystemTime] 2010-07-19T14:36:01.563615800Z



EventRecordID 31098


Correlation

- Execution


[ ProcessID] 272


[ ThreadID] 280



Channel System


Computer Lardacus-PC

- Security


[ UserID] S-1-5-18

- EventData

FileNameLength 21

FileName C:\Windows\MEMORY.DMP