Every time I log into steam I get one of 2 things
1) Steam freezes over and over until it finally crashes
2) I try to open tf2, it takes ~5min to get steam to do so and steam gives a mounting error for tf2.
3) Steam becomes unkillable via task manager / command prompt

Things I've tried:
1) Restarting
2) Deleting clientregistry.blob / appupdatestats.blob

any help???