Windows 7 ultimate crashes randomly: Event 41,KernelPow

Windows crashes randomly at any time. I've upgraded Realtek audio driver as suggested in other threads, still it crashes any time, some times just after boot. I've also changed my power settings to 'high performance', so 'sleeping' shouldn't be a problem either.

Error message: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

Though I've changed my settings to generate minidump file, I don't see any in %SystemRoot% folder. So I'm posting my event details.

- System
- Provider
[ Name] Microsoft-Windows-Kernel-Power
[ Guid] {331C3B3A-2005-44C2-AC5E-77220C37D6B4}
EventID 41
Version 2
Level 1
Task 63
Opcode 0
Keywords 0x8000000000000002

- TimeCreated
[ SystemTime] 2010-03-20T19:40:51.869223500Z
EventRecordID 10829
Correlation

- Execution
[ ProcessID] 4
[ ThreadID] 8
Channel System
Computer bonapart

- Security
[ UserID] S-1-5-18

- EventData
BugcheckCode 0
BugcheckParameter1 0x0
BugcheckParameter2 0x0
BugcheckParameter3 0x0
BugcheckParameter4 0x0
SleepInProgress false
PowerButtonTimestamp 0


Someone, please help me on this. My laptop is not workable since last 3 days. I'm repenting my decision to install Windows 7 Ultimate on Lenovo Y410 (7757-8CQ model). Lenovo website doesn't provide updated Windows 7 drivers.

Thanks and regards.

Hi Bare Foot Kid,

I've already tried using "Last known good ..." option but it didn't help.

My Updates:

Above mentioned DriverEasy tool reported few outdated drivers. Problem persists even after updating these drivers. According to this tool all the drivers are now up to date.

@Kari : as you suggested earlier I checked events before Kernel 41, but nothing looked suspicious. I've cleared all the logs . I'll post new data here after next crash.

Thank you all for your help. It's appreciated.