To help keep our study as tidy as possible (ultimately a doomed ambition), I purchased a little splitter on eBay for £17.50 which connects two PCs to a single Keyboard, Monitor and Mouse. You press a little button and are immediately toggled between the two machines. Linux to Windows to Linux to Windows. Within the next few days I got to press this button so often that even now my left ring finger twitches involuntarily when under stress.