When looking for answers please follow these simple steps.
#1 : Read the red stickys First.
New PR problems are rare so most answers can be found here.
In fact the red stickys have 3 about MD5 tool problems.
Sticky#5:
Punkbuster Error: MD5Tool Mismatch Troubleshooting
Sticky#9:
MD5Tool Mismatch: RendDX9x2.dll & vtuneapi.dll
Sticky#10:
Punkbuster Error: MD5Tool Mismatch Solution
If you haven't read them please do so. There is a very good chance your answer lies within one.
#2. Use the search feature on PRs web site or Google it!.
Often the quickest way to find what your looking for when you have an error message.
#3. Please remember to include your basic PC info in your post
You have spent some time trying to help yourself without any luck, so your ready to ask for help:
Please include your basic PC info in your post :
Operating system = XP, Vista etc.
systems specks = cpu/speed, ram installed, video card/video ram on card,type of monitor
network setup = cable, 4 port 10/100/1000 d- link gamers lounge/ wired connection.
And a brief history before and after problem started.
Please describe when your CTD or problem hits and
what you have already tried.
The more info you can give the better your chance of getting a quick answer back.
You don't have to write a book,
but your basic PC info is needed to help you.
Good luck
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