Am posting this here in case someone else has had a similar problem.
On a Surface Pro, i7 discreet GPU, 16g RAM, Win10 that has been running sketchup files perfectly, since a recent windows update the SU files run fine but opening (double clicking) components and groups causes the cursor to change to the circular loading icon and take several seconds to open the group/component.
This didn’t happen previous to the update. Have tried everything and GPU, CPU etc seem to be running fine and are set to high performance via this method: https://youtu.be/k-VWlincHO4
The sketchup models run fast and snappy other than this one issue when opening/closing groups/components.
Any help much appreciated.