New
#11
These permissions aren't exactly dangerous in themselves, but they do lower the resistance threshold to malware, and consequently could lead to huge problems later.
A repair install is really your best option - and even a Factory Recovery will still entail a mass of updates being downloaded afterwards, anyhow which could amount to well over a GB of data. Do you have access to a higher speed connection at all?
See the repair install instructions here... Repair Install
... and check your manual for instructions about doing a full System Recovery to ex-factory condition.
In either case, you should back up to external media before attempting the procedure.