My father was downloading something from one of the websites from where he does his share trading. Now, what has happened is that the computer is not starting normally anymore. It gets stuck just after the welcome screen, before any icons are displayed. Earlier it showed a warning for a coupe of times which said "The instruction at 0x77e7ddf1 referenced memory at 0x00000000. The memory could not be written. Click OK to terminate".
Now it says " Window explorer has encountered a problem and needs to close" and then it gets stuck.
Right now I am writing this message by running FF using the task manager.. No icons are showing up.