Thank you so much to Jub and Cardinal24.
A bit more info for the blondes out there (yes I even managed it!), if your XP Mode won't start.
Locate the .VSV - (from desktop, hit F3, search C: drive for .VSV)
Delete the .VSV file (will be named something like WinXP Mode.VSV, didn't take note!)

If that doesn't solve it, yes, go to the Task Manager (I didn't know how to find that! So went Control Panel, then top right corrner Search Box, search for Task Manager. Results give you a link to Task manager).
Scroll down the list on the "Processes" tab, find the process referring to VPC, and bottom right corner I think it was, "End Process".
It took longer to join and make this post than get my XP Mode running, thamk you guys!!