Laptop restarts everytime I boot it.

Hii guys, my laptop restarts everytime I boot it. It restarts once or twice then it works fine for as long as I keep it on. Its happening every single time.

Following are the errors from the event log.

Faulting application name: HCMSoundChanger.exe, version: 1.6.0.0, time stamp: 0x4806aa2b
Faulting module name: ntdll.dll, version: 6.1.7600.16385, time stamp: 0x4a5bdadb
Exception code: 0xc0000005
Fault offset: 0x0002fc47
Faulting process id: 0x112c
Faulting application start time: 0x01cac41c202a348d
Faulting application path: C:\Program Files\TOSHIBA\HDMICtrlMan\HCMSoundChanger.exe
Faulting module path: C:\Windows\SYSTEM32\ntdll.dll
Report Id: 609b8831-300f-11df-ba26-82d479083810


Next one was:

Faulting application name: AluSchedulerSvc.exe, version: 3.4.1.234, time stamp: 0x47bdf26a
Faulting module name: AluSchedulerSvc.exe, version: 3.4.1.234, time stamp: 0x47bdf26a
Exception code: 0xc0000005
Fault offset: 0x000083f6
Faulting process id: 0xe64
Faulting application start time: 0x01cac41c4ddc5620
Faulting application path: C:\Program Files\Symantec\LiveUpdate\AluSchedulerSvc.exe
Faulting module path: C:\Program Files\Symantec\LiveUpdate\AluSchedulerSvc.exe
Report Id: ee046313-3010-11df-ba26-82d479083810

Next :

Faulting application name: HCMSoundChanger.exe, version: 1.6.0.0, time stamp: 0x4806aa2b
Faulting module name: ntdll.dll, version: 6.1.7600.16385, time stamp: 0x4a5bdadb
Exception code: 0xc0000005
Fault offset: 0x0002fc47
Faulting process id: 0x112c
Faulting application start time: 0x01cac41c202a348d
Faulting application path: C:\Program Files\TOSHIBA\HDMICtrlMan\HCMSoundChanger.exe
Faulting module path: C:\Windows\SYSTEM32\ntdll.dll
Report Id: 609b8831-300f-11df-ba26-82d479083810

Next :

Faulting application name: AluSchedulerSvc.exe, version: 3.4.1.234, time stamp: 0x47bdf26a
Faulting module name: AluSchedulerSvc.exe, version: 3.4.1.234, time stamp: 0x47bdf26a
Exception code: 0xc0000005
Fault offset: 0x000083f6
Faulting process id: 0x156c
Faulting application start time: 0x01cac362d78cebb1
Faulting application path: C:\Program Files\Symantec\LiveUpdate\AluSchedulerSvc.exe
Faulting module path: C:\Program Files\Symantec\LiveUpdate\AluSchedulerSvc.exe
Report Id: d5f265ca-2fb5-11df-88b6-e81e982a5c0a

Most of my errors are the ones above. Help please, its very annoying.
My laptop is a Toshiba which came with Windows vista, which i upgraded to windows 7. I have also connected it to a flat screen monitor which I had, a mouse, keyboard n speaker via USB, which I use for gaming. Thanks in advance.

Have you experienced these problems from the start of the upgrade?

Did you upgrade over the existing Vista install or did you perform a clean install?

Yes, I did upgrade over an existing Vista.

But I didnt have this problem since I installed 7 which was over two months ago. This problem is occuring since the past 1-2 weeks.

My opinion would be to backup what you need to save, and do a clean install. These sorts of corruptions tend to happen after performing an "upgrade installation". This will take you a few hours maybe, but your windows 7 install will be clean and trouble free.

If you have an "Upgrade" version of windows 7, here's a useful tutorial on how to perform a clean install.
Clean Install with a Upgrade Windows 7 Version[2]=General%20Tips