BSOD with 0x0000008e (0xc0000005, 0x804e7418, 0xaa91b654, 0x00000000)

Over the week i was trying to install .Net 3.5 SP1 and every time i complete the installation system start crashing with BSOD [Blue Screen Of Dead]. My machine is IBMR50e with WinXPPro SP3 installed on it. So at first my guess was there is somthing wrong with driver isntallation during the .Net 3.5 SP1 installation. So i uninstalled the all .net frameworks by using framwork cleaning utility from url dotnetfx cleanup tool and updated all my machine's drivers. Later i tried to install all framework one by one as 3.5 SP1 install 2.0,3.0 and 3.5 framworks. Now as soon as i installed .Net 2.0 Framework i started getting BSOD. i knew there is some thing wrong with .Net framework installtion. I tried to check the event log by starting my machine in SafeMode. I got the following entry in EventLog



Event Type: Information
Event Source: Save Dump
Event Category: None
Event ID: 1001
Date: 6/11/2009
Time: 8:54:17 PM
User: N/A
Computer: XYZ
Description:
The computer has rebooted from a bugcheck. The bugcheck was: 0x0000008e (0xc0000005, 0x804e7418, 0xaa91b654, 0x00000000). A dump was saved in: C:\WINDOWS\MEMORY.DMP.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.



I Checked and found that these are the Exceptions KERNEL_MODE_EXCEPTION_NOT_HANDLED for STATUS_ACCESS_VIOLATION which in term tells about invalid access of memory. Which can be because of many issue few are null pointer access , with my less disk space, confusing about checking drivers installed during .Net framework installation. But as expacted these were not the real issues with my machine.
Now i tried to go for virus infect or malware check. I downloaded latest ComboFix.exe from combofix.org . I run this tool from safemode and followed all instruction as appear on screen. I allowed combofix to download microsoft recovery console and clicked yes if it appear to kill any running application like anti virus. Later i proceed till end without quitting or killing the ComboFix.exe and yeappy once combofix completed the process after rebooting it will take some 10 min to complete it's operation but that was worthy. Now i have .Net 3.5 SP1 framework and it's working like charm without any issues. Hope it can help you also if you ever face this kinda no clue problem.

Virat