Lvl 41 character after a few moments of loading a save will start to move very slowly backward by itself. Pushing the forward (W) key causes the character to move slowly forward. Tried loading an earlier save and same thing happens. Mods are (all have been running for some time):

unofficial oblivion patch

unofficial shivering isles patch

black rock manor

clocks of cyrodiil

ducks and swans

kvatch rebuilt (uninstalled)

specs: