I tried unplugging all USB devices one by one and the problem isn't fixed.
Got another BSOD:
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Dump File : Mini110811-01.dmp
Crash Time : 11/8/2011 4:19:14 PM
Bug Check String : KERNEL_MODE_EXCEPTION_NOT_HANDLED
Bug Check Code : 0x1000008e
Parameter 1 : 0xc0000005
Parameter 2 : 0x00000000
Parameter 3 : 0xa00d4334
Parameter 4 : 0x00000000
Caused By Driver :
Caused By Address :
File Description :
Product Name :
Company :
File Version :
Processor : 32-bit
Crash Address :
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\Mini110811-01.dmp
Processors Count : 2
Major Version : 15
Minor Version : 6002
Dump File Size : 160,152
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Dump File : Mini110611-01.dmp
Crash Time : 11/6/2011 8:52:57 PM
Bug Check String : IRQL_NOT_LESS_OR_EQUAL
Bug Check Code : 0x0000000a
Parameter 1 : 0x822b6a0b
Parameter 2 : 0x00000002
Parameter 3 : 0x00000000
Parameter 4 : 0x824b76de
Caused By Driver : USBPORT.SYS
Caused By Address : USBPORT.SYS+324f
File Description : USB 1.1 & 2.0 Port Driver
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.0.6002.18005 (lh_sp2rtm.090410-1830)
Processor : 32-bit
Crash Address : ntkrnlpa.exe+4dfd9
Stack Address 1 : ntkrnlpa.exe+aa6de
Stack Address 2 : ntkrnlpa.exe+a889d
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\Mini110611-01.dmp
Processors Count : 2
Major Version : 15
Minor Version : 6002
Dump File Size : 135,216
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Dump File : Mini110211-01.dmp
Crash Time : 11/2/2011 7:46:25 PM
Bug Check String : CRITICAL_OBJECT_TERMINATION
Bug Check Code : 0x000000f4
Parameter 1 : 0x00000003
Parameter 2 : 0x866f4d90
Parameter 3 : 0x866f4edc
Parameter 4 : 0x82639ab0
Caused By Driver : ntkrnlpa.exe
Caused By Address : ntkrnlpa.exe+cdb3f
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.0.6002.18484 (vistasp2_gdr.110617-0336)
Processor : 32-bit
Crash Address : ntkrnlpa.exe+cdb3f
Stack Address 1 : ntkrnlpa.exe+292c40
Stack Address 2 : ntkrnlpa.exe+1f135d
Stack Address 3 : ntkrnlpa.exe+1f1304
Computer Name :
Full Path : C:\Windows\Minidump\Mini110211-01.dmp
Processors Count : 2
Major Version : 15
Minor Version : 6002
Dump File Size : 139,472
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Dump File : Mini080611-01.dmp
Crash Time : 8/6/2011 11:39:45 AM
Bug Check String : KERNEL_MODE_EXCEPTION_NOT_HANDLED
Bug Check Code : 0x1000008e
Parameter 1 : 0xc0000005
Parameter 2 : 0x00000000
Parameter 3 : 0x899f3838
Parameter 4 : 0x00000000
Caused By Driver :
Caused By Address :
File Description :
Product Name :
Company :
File Version :
Processor : 32-bit
Crash Address :
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\Mini080611-01.dmp
Processors Count : 2
Major Version : 15
Minor Version : 6002
Dump File Size : 139,296
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thanks
Carlos