Booting of my Computer started taking long time and Browsers such as FireFox and IE also started hanging sometimes.
And, sometimes booting also interrupted.
So, I suspected virus infection in my computer. When I checked the Task manager I noticed some strange process "taskmger". Note the spelling, it is not taskmgr.
By searching this taskmger in the windows registry (start->Run->regedit), I came to know the physical path of the taskmger.exe file.
But windows explorer didn't show the taskmger.exe in the specified path. Even setting the option (Tools->Folder Options->View) as viewing hidden files didn't help to see this taskmger.exe
So used DOS command prompt to see the files dir *.exe /a showed the taskmger.exe.
del taskmger.exe /a didn't work. It showed access denied error.
When I checked the attributes of this file using attrib it was showing as SHR.
So I changed the attribute using attrib -s -h -r taskmger.exe.
It helped to change the attribute. But the attrbute was again set as SHR automatically before entering del command.
So I kept ready with del command and then again changed the attribute. Then quickly entered the pre-typed del command. Finally the taskmger.exe got deleted and as of now I am not seeing any booting problem or browser hanging issue.