Does your antivirus software scan Office documents? Is it fully patched (Office XP i mean)? Do you have any network mapped drives attached? How big is or are the files that open "slowly"? Is it just the first file, or all files?
Dell XPS 13 9370 (2018) review
No need to scan sketches into your computer with Moleskine's new smart pen
Streaming : Netflix ou Amazon Prime Video ?