Where do I find attachments on my PC

What sort of attachments.
The more information you give the better we can help..

It should be a folder inside of "my documents". c:\users\(user name)\mydocuments\attatchments\

Depends your attachments reference to?
Like if downloaded they will be in downloads (My documents)
For outlook will be in received filed respective of outlook location path folder, sme with Omessenger, Google Talk etc.