When reinstalling a client computer, what to do with backup?
I have been assigned a project where i am suppose to install W7 on all Windows xp computers. I am basically going to do a fresh install which with other word means that everything on the computer is wiped out. I have a backup going on all the client computers, so users have been informed that everything they need to save should be dumped into My Document folder which backup Exec takes backup off. Even though backup exec do have a copy of users My Document folder on the Media server (provided that a sync have been succesfully completed), i still use an external USB hard drive to take a backup on the disk. I do notive that everytime i try to compare the My Document folder from the USB disk to the My Document folder on the media server, i get a mismatch in the amount of MB and files and folders. So for example, for user Jon, My Document folder is around 1000MB with 100 folders and 2000 files, while on the media server it could be 1400MB 102 folders and 2200 files. I know it could be that the user have been deleting something from the computer locally, which it is not deleted from the server, since i have a retention policy of 30 days. Sometimes it could be the other way around, that there are more MB, files and folder on computer locally then the media server.
My question is simple, what process should i use when reinstalling a client computer, to make sure i dont lose any data when copying it over to the freshly installed computer. What happens if i dump the content of the USB disk on to the My Document folder on the newly installed computer, and then install the backup exec and let it run? Please help me with this. Thanks.