I checked the event viewer, I found 6 system errors.
They are
1) Event Type:	Error
Event Source:	System Error
Event Category:	(102)
Event ID:	1003
Date:		15/07/2007
Time:		17:30:12
User:		N/A
Computer:	HOME-2A555C42A6
Description:
Error code 000000c2, parameter1 00000040, parameter2 00000000, parameter3 80000000, parameter4 00000000.
For more information, see Help and Support Center at 
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 53 79 73 74 65 6d 20 45   System E
0008: 72 72 6f 72 20 20 45 72   rror  Er
0010: 72 6f 72 20 63 6f 64 65   ror code
0018: 20 30 30 30 30 30 30 63    000000c
0020: 32 20 20 50 61 72 61 6d   2  Param
0028: 65 74 65 72 73 20 30 30   eters 00
0030: 30 30 30 30 34 30 2c 20   000040, 
0038: 30 30 30 30 30 30 30 30   00000000
0040: 2c 20 38 30 30 30 30 30   , 800000
0048: 30 30 2c 20 30 30 30 30   00, 0000
0050: 30 30 30 30               0000    
2) Event Type:	Error
Event Source:	System Error
Event Category:	(102)
Event ID:	1003
Date:		15/07/2007
Time:		15:57:35
User:		N/A
Computer:	HOME-2A555C42A6
Description:
Error code 100000d1, parameter1 00000004, parameter2 00000002, parameter3 00000001, parameter4 b70caf69.
For more information, see Help and Support Center at 
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 53 79 73 74 65 6d 20 45   System E
0008: 72 72 6f 72 20 20 45 72   rror  Er
0010: 72 6f 72 20 63 6f 64 65   ror code
0018: 20 31 30 30 30 30 30 64    100000d
0020: 31 20 20 50 61 72 61 6d   1  Param
0028: 65 74 65 72 73 20 30 30   eters 00
0030: 30 30 30 30 30 34 2c 20   000004, 
0038: 30 30 30 30 30 30 30 32   00000002
0040: 2c 20 30 30 30 30 30 30   , 000000
0048: 30 31 2c 20 62 37 30 63   01, b70c
0050: 61 66 36 39               af69    
3) Event Type:	Error
Event Source:	System Error
Event Category:	(102)
Event ID:	1003
Date:		14/07/2007
Time:		11:03:18
User:		N/A
Computer:	HOME-2A555C42A6
Description:
Error code 1000008e, parameter1 c0000005, parameter2 01010101, parameter3 b350f9e0, parameter4 00000000.
For more information, see Help and Support Center at 
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 53 79 73 74 65 6d 20 45   System E
0008: 72 72 6f 72 20 20 45 72   rror  Er
0010: 72 6f 72 20 63 6f 64 65   ror code
0018: 20 31 30 30 30 30 30 38    1000008
0020: 65 20 20 50 61 72 61 6d   e  Param
0028: 65 74 65 72 73 20 63 30   eters c0
0030: 30 30 30 30 30 35 2c 20   000005, 
0038: 30 31 30 31 30 31 30 31   01010101
0040: 2c 20 62 33 35 30 66 39   , b350f9
0048: 65 30 2c 20 30 30 30 30   e0, 0000
0050: 30 30 30 30               0000    
4) Event Type:	Error
Event Source:	System Error
Event Category:	(102)
Event ID:	1003
Date:		06/07/2007
Time:		20:56:56
User:		N/A
Computer:	HOME-2A555C42A6
Description:
Error code 100000c5, parameter1 00000004, parameter2 00000002, parameter3 00000001, parameter4 8054afd2.
For more information, see Help and Support Center at 
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 53 79 73 74 65 6d 20 45   System E
0008: 72 72 6f 72 20 20 45 72   rror  Er
0010: 72 6f 72 20 63 6f 64 65   ror code
0018: 20 31 30 30 30 30 30 63    100000c
0020: 35 20 20 50 61 72 61 6d   5  Param
0028: 65 74 65 72 73 20 30 30   eters 00
0030: 30 30 30 30 30 34 2c 20   000004, 
0038: 30 30 30 30 30 30 30 32   00000002
0040: 2c 20 30 30 30 30 30 30   , 000000
0048: 30 31 2c 20 38 30 35 34   01, 8054
0050: 61 66 64 32               afd2    
5) Event Type:	Error
Event Source:	System Error
Event Category:	(102)
Event ID:	1003
Date:		06/07/2007
Time:		18:54:57
User:		N/A
Computer:	HOME-2A555C42A6
Description:
Error code 100000d1, parameter1 00000000, parameter2 00000002, parameter3 00000000, parameter4 b6d2f491.
For more information, see Help and Support Center at 
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 53 79 73 74 65 6d 20 45   System E
0008: 72 72 6f 72 20 20 45 72   rror  Er
0010: 72 6f 72 20 63 6f 64 65   ror code
0018: 20 31 30 30 30 30 30 64    100000d
0020: 31 20 20 50 61 72 61 6d   1  Param
0028: 65 74 65 72 73 20 30 30   eters 00
0030: 30 30 30 30 30 30 2c 20   000000, 
0038: 30 30 30 30 30 30 30 32   00000002
0040: 2c 20 30 30 30 30 30 30   , 000000
0048: 30 30 2c 20 62 36 64 32   00, b6d2
0050: 66 34 39 31               f491    
6) Event Type:	Error
Event Source:	System Error
Event Category:	(102)
Event ID:	1003
Date:		19/06/2007
Time:		14:52:48
User:		N/A
Computer:	HOME-2A555C42A6
Description:
Error code 10000050, parameter1 cc2289e8, parameter2 00000000, parameter3 b6d884cc, parameter4 00000000.
For more information, see Help and Support Center at 
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 53 79 73 74 65 6d 20 45   System E
0008: 72 72 6f 72 20 20 45 72   rror  Er
0010: 72 6f 72 20 63 6f 64 65   ror code
0018: 20 31 30 30 30 30 30 35    1000005
0020: 30 20 20 50 61 72 61 6d   0  Param
0028: 65 74 65 72 73 20 63 63   eters cc
0030: 32 32 38 39 65 38 2c 20   2289e8, 
0038: 30 30 30 30 30 30 30 30   00000000
0040: 2c 20 62 36 64 38 38 34   , b6d884
0048: 63 63 2c 20 30 30 30 30   cc, 0000
0050: 30 30 30 30               0000    
Anyone make any sense of that?
DK