Here at TechnoEsq we have advised attorneys to steer clear of Microsoft Vista, at least for now, for a number of reasons. The most recent problems arising with Vista overshadow all others: it turns out that if you try and copy a large number of files (approx. 16,400), a number a firm engaged in e-discovery would easily do, Vista “has some problems”. Serious problems on the order of not actually copying the files.
Mind you, Vista doesn’t tell you there is a problem copying the files, Vista simply acts as if the files were copied when in fact they were not. At some point after the alleged “copy” a message pops up saying the user is “Out of Memory”. The only way to see if all files were copied is to compare the source folder with the destination folder.  Only at this point would a user discover Vista stoppped transferring files about a third of the way through the transfer. This is most definitely not something an attorney would want to happen when presenting e-documents and certifying they are copies of the documents you were ordered to produce.
First reported at Zdnet, the bad part is that Microsoft has known about this problem since before service pack 1 beta was released for Vista and yet they did not include it! The even worse part? Microsoft isn’t volunteering the hotfix, you must ask for it specifically.
Again, use Microsoft Vista at your own peril, or stick with XP. Who knows what other files transfer or other problems are in Vista and Microsoft has chosen not to mention them to users.