Anilrgowda

New to Windows Vista is the Reliability Monitor, which tracks your system stability over time and gives you quick access to different problems. This should be your first stop if you’re trying to determine whether a recent hardware or software upgrade might be causing problems, because it visually displays historical failures and major changes such as upgrades and installs. Check out the (in)stability of my primary computer above. Mine’s probably worse than average because I’m using a laptop (laptops are way more complicated than desktops) and I use a lot of development and specialized applications.
To open the Reliability Monitor, follow these steps:
1. Click Start, type Reliability, and then click Reliability and Performance Monitor. You can also access it from the Computer Management console.
2. Under Monitoring Tools, click Reliability Monitor.
3. In the upper-right corner, note the date drop-list. Click it, and then click Select All.
4. Browse the System Stability Report below the chart to view the dates when the following events occurred on your computer:

• Software (Un)Installs
• Application Failures
• Hardware Failures
• Windows Failures
• Miscellaneous Failures

If you see a sudden drop in the system stability chart, look up that specific date (and a few days prior) and see what changed in the System Stability Report. Try uninstalling any applications or hardware from that time period, and see if the stability returns.