Vista - HELP! Startup Repair

Can someone help me with my problem. I've been experiencing this problem for 2 weeks now. Almost every other day while I'm doing something with my laptop, surfing the net or typing something on ms word, my laptop just shutsdown and then when I try to turn it on again, it shutsdown immediately. I usually wait for a few minutes before I turn it on again and then I start the windows startup repair. And after it attempts the repair it says that Windows Cannot Repair Automatically. How do I fix this problem? Help!

Here's the problem details.

Problem Event Name: StartupRepairV2
Problem Signature 01: Autofailover
Problem Signature 02: 6.0.6000.16386.6.0.6001.18000
Problem Signature 03: 3
Problem Signature 04: 65537
Problem Signature 05: unknown
Problem Signature 06: no root cause
Problem Signature 07: 0
Problem Signature 08: 2
Problem Signature 09: WrpRepair
Problem Signature 10: 2
Os Version: 6.0.6000.2.0.0.256.1
Locale ID: 1033

Have you tried diagnostics?


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System Files - SFC Command
Run sfc/scannow under "Administrator:Command Prompt" to check for integrity Violations and repair if possible

Run these and save and attach to your post:
Start>Control Panel>System and Maintenance>Performance Information and Tools>Advanced Tools>

Generate a system health Report

Open Reliability and Performance Monitor>Reliability Monitor

View Performance Details In Event Log

You may also want to think seriously about backing up your data and re-installing Vista. Have you used reg cleaners?

This is a self diagnostic that will tell you if you have issues. Run this and check it out. Let me know the results:http://www.eset.com/download/sysinspector.php

I haven't tried diagnostics and reg cleaners. I'm not really that good with computers. Sorry. Should I post what I've done here? I mean, there are private information written there right?