If using the GUI version then follow ken's advice - right click on the gui flower and select pause when done.
There is also a selection inside the configuration tab of F@H GUI. Right click the flower, selct Configuration, select the Connections tab and select "Ask before using Network". You may get several requests to send the work results up. After the results are sent then stop the process.
You can also restart into Safe Mode and copy the entire folder to the new computer via a jump drive.
If you are using the console version you need to edit the registry, or boot into Safe Mode and copy the folder.
Thanks guys! I have the GUI version, so I'll do just that.
Now what's this about how it only works when nothing else is and only when you're logged on? I (now) have 2 XP machines (the old one was W2K Pro) and each one has two XP accounts: one for me, one for my daughter. We always leave email and Firefox and sometimes a game (like Petz) running, does that mean Folding isn't going to run?