Install Windows Updates. Keep doing this!
Adjust for performance. Performance Options > Visual Effects > Adjust for best performance.
Adjust Virtual Memory. Performance Options > Advanced > Virtual Memory > Change > Custom size > set to the “Recommended” value. For me that is 1396 MB for both the initial and the maximum size. This had a very good impact!
Check System Files. Run the System File Checker scan
sfc \scannow See https://support.microsoft.com/en-us/kb/929833