Urgent: debugging contest

Hi guys...I need urgent help from you people.

Recently I cleared round 1 of microsoft competition. Tom. is my 2nd round. In that we need to find bugs in the operating system

For Instance,
Microsoft excel compatibility with Windows Starter 2007 or voice conference, chatting problem in yahoo messenger with WinXp etc.

I have never done stuff like this. Can anyone suggest me how to prepare for this(finding bugs) in a short time.

Or incase anyone is very generous to share recent problems(bugs,compatibility etc.) they are facing with microsoft OS

I hope my problem is clear to you all, if not just let me know.

PS: I am having high hopes from you guys. This is only place I could think of getting early/genuine help.

Thank You

A Quick tip from my wife.. To find bugs.. Act like you dont know what everything does.. Dont follow the Known ways of using a program.. IE. with Excel.. Try to create a VBA project with out a open spreadsheet..

As developers we often understand the order of doing things in a application.. Try to forget all this (Only while bug testing).. Try the most unusual combination of things..

When are you due to do Round 2..

Good luck and all our hopes and good wills are with you...

Gremmy...

Its tomorow(26th of feb) 12:30 pm.

Thank for your suggestion. I'll try to do be as dumb as possible to find bug. :)

I am eagerly waiting for other replies also.

Thanks again

security issue in Windows Media Player....could allow remote code execution.......