Help with Troubleshooting Hardware Malfunction

Hello guys! Every now-and then (usually after pc has been shut down for a few or several hours) I get the following BSOD error:

*** Hardware Malfunction
Call your hardware vendor for support
*** The system has halted ***

The message occurs only after starting up windows, usually right after or around the welcome screen. but sometimes it loads my desktop before it occurs. After restarting (from the restart button) it seems to be working fine.

Can somebody help me troubleshoot this problem? It is getting annoying. (especially that I have the problem for a few months now). I have re-installed Windows 2 times during this period but the problem is still there.

*Note: If I restart the PC the error doesn't occur. Only after it has been shut down for several hours(as I mentioned above)

In Event Viewer I do find the error with the following details:

Event 41, Kernel-Power
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
Task category: (63)
Level: Critical
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] 2014-10-27T08:18:57.822423400Z
EventRecordID 10457
Correlation
- Execution
[ ProcessID] 4
[ ThreadID] 8
Channel System
Computer Isti-PC
- Security
[ UserID] S-1-5-18
- EventData
BugcheckCode 0
BugcheckParameter1 0x0
BugcheckParameter2 0x0
BugcheckParameter3 0x0
BugcheckParameter4 0x0
SleepInProgress false
PowerButtonTimestamp 0

Click to expand...

Right after the Critical thing I can see 3 errors in 10 seconds. They are the following:

Event 3, Kernel-EventTracking
Session "Microsoft-Windows-Setup" stopped due to the following error: 0xC000000D
- System
- Provider
[ Name] Microsoft-Windows-Kernel-EventTracing
[ Guid] {B675EC37-BDB6-4648-BC92-F3FDC74D3CA2}
EventID 3
Version 0
Level 2
Task 2
Opcode 14
Keywords 0x8000000000000010
- TimeCreated
[ SystemTime] 2014-10-27T08:18:59.975227200Z
EventRecordID 84
Correlation
- Execution
[ ProcessID] 4
[ ThreadID] 204
Channel Microsoft-Windows-Kernel-EventTracing/Admin

Computer Isti-PC

- Security

[ UserID] S-1-5-18

- EventData

SessionName Microsoft-Windows-Setup
FileName C:\Windows\Panther\setup.etl
ErrorCode 3221225485
LoggingMode 5

Click to expand...

Event 3, Kernel-EventTracking
Session "Microsoft Security Client OOBE" stopped due to the following error: 0xC000000D
+ System
- Provider
[ Name] Microsoft-Windows-Kernel-EventTracing
[ Guid] {B675EC37-BDB6-4648-BC92-F3FDC74D3CA2}
EventID 3
Version 0
Level 2
Task 2
Opcode 14
Keywords 0x8000000000000010
- TimeCreated
[ SystemTime] 2014-10-27T08:19:00.006427300Z
EventRecordID 85
Correlation
- Execution
[ ProcessID] 4
[ ThreadID] 200
Channel Microsoft-Windows-Kernel-EventTracing/Admin
Computer Isti-PC
- Security
[ UserID] S-1-5-18

- EventData

SessionName Microsoft Security Client OOBE
FileName C:\ProgramData\Microsoft\Microsoft Security Client\Support\EppOobe.etl
ErrorCode 3221225485
LoggingMode 5

Click to expand...

And

Event 1101, Eventlog
Audit events have been dropped by the transport. 0
+ System
- Provider
[ Name] Microsoft-Windows-Eventlog
[ Guid] {fc65ddd8-d6ef-4962-83d5-6e5cfe9ce148}
EventID 1101
Version 0
Level 2
Task 101
Opcode 0
Keywords 0x4020000000000000
- TimeCreated
[ SystemTime] 2014-10-27T08:19:08.898442900Z
EventRecordID 2708
Correlation
- Execution
[ ProcessID] 1168
[ ThreadID] 1496
Channel Security
Computer Isti-PC
Security
- UserData
- AuditEventsDropped
Reason 0

Click to expand...

PC specs:

Windows 7 Ultimate x86
Palit Daytona Radeon HD 4670 512MB, 128Bit Video
Intel Core2Duo E6420 2.13Ghz
WD 320 GB HDD
Elitegroup P965T-a Motherboard\
3 GB DDR2 (2x Kingston, 1x Samsung)
450W ATX PSU

Click to expand...