Hello there.
Why don't you try to run a System File Check to see if everything's in order?
Open an Elevated Command Prompt (write "cmd" without quotes in start, right click it and click run as administrator)
In the cmd window write "sfc.exe /scannow" again, without quotes, hit enter and let it check the system files, if there's an anomaly, it'll try to fix it.
Do that and report back, please