If a program appears to crash to often Windows may apply a control Shim to monitor the app, this can cause slow operations in Modo such as UV edits.

To check if windows is applying a shim:

1. Press start and in the search type regedit.exe and hit enter
2. Go to this folder: HKEY\_LOCAL\_MACHINE\SOFTWARE\Microsoft\FTH\State

If modo is listed in there, then a shim is being applied.

To remove the shim

1. Press start and in the search type cmd.exe, right click on cmd.exe and choose run as administrator, then press yes
2. In the command prompt type: Rundll32.exe fthsvc.dll,FthSysprepSpecialize
3. Log out of windows and back in to see the changes.

Thanks to @funk for this information.