Fatal error: Call to undefined function wincache_ucache_get()
I would assume that this is cache related. Try clearing your cache directly on the database by truncating the cache_* tables (since Drush is not working). 

You cannot delete modules by removing them from in your modules folder. You have to disable/uninstall the module first, if you cannot disable the module through Drush or UI you can edit the system table by searching the column 'name' for your module and setting the column 'status' to 0. After that clear your cache again.