Hi Bansal,
Thank you for posting your query in Microsoft Community.
BCCode: 3b 0x0000003b
Bug Check 0x3B: SYSTEM_SERVICE_EXCEPTION
Try removing and reseating all cards, memory, and cables (both ends when possible) - actually remove and replace - do not just snug (on a PC) and clean out the dust bunnies and vents. On a laptop about all that can be done is reset the memory and clean the vents. (Of course remove ALL power prior to opening the case.)
3b is usually a graphic's driver (display adapter/video driver), other possibilities include but are not limited to antivirus/antispyware/security programs and even memory (mapping).
BCCode: 3b 0x0000003b
**Cause:**This error has been linked to excessive paged pool usage and may occur due to user-mode graphics driver’s crossing over and passing bad data to the kernel code.
Follow the suggestions listed below for a possible fix:
Method 1:
Step 1: Boot into safe mode and check if the issue persists.
Start your computer in safe mode
**http://windows.microsoft.com/en-US/windows7/Start-your-computer-in-safe-mode**
Step 2: If the issue does not occur in safe mode, you may put your system in clean boot state (in normal mode) to troubleshoot the issue.
Place the computer in a clean boot state and then check if it helps. You can start Windows by using a minimal set of drivers and startup programs. This kind of startup is known as a "clean boot." A clean boot helps eliminate software conflicts.
How to perform a clean boot to troubleshoot a problem in Windows Vista, Windows 7, or Windows 8
**http://support.microsoft.com/kb/929135**
Note: Follow the section “More information” to reset the computer to start as usual after troubleshooting with clean boot.
You may also refer to the below mentioned link for more information on Blue Screen:
Resolving stop (blue screen) errors in Windows 7
**http://support.microsoft.com/kb/929338**
Method 2: Update the chipset, video card, display and network adapter drivers to the latest by visiting the computer manufacturer’s website.
Update a driver for hardware that isn't working properly
Update drivers: recommended links
**http://windows.microsoft.com/en-US/windows7/Update-drivers-recommended-links**
Hope this information helps. For any further Windows related assistance, feel free to contact us and we will be happy to help.