Hi,
I am Prashant. I am Microsoft user like you. It's pleasure for me to help you.
Here are following ways to clear cache memory. There is no problem to clear cached memory
1- When You restart your pC , it will also clear RAM cached.
2- Please disable startup apps which are not using.
3-Go to Task Manger and close those Process or programme which are not using. It will also clear cache memory.
I hope it helps you. Please let me know if this works for you.
Warm Regards,
Prashant
Time zone - UTC+5:30