All is well with the ssd. After installing a fresh copy of Windows 10, the laptop's performance immediately improved; I didn't bother to measure the difference in speed. Even with multiple programs running and a lot of copying going on, the disk usage never went beyond 4%.
AMD Phenom II X4 940 💻 Black Edition 3.0GHz AM2+ Processor - Retail
96 Review
🌬️ Silent Cooling Power: Dark Rock Pro 4 CPU Cooler with 250W TDP, BK022
134 Review
🔋 Power Up Your Gaming Rig with AMD Ryzen 5 2600 Processor with Wraith Stealth Cooler - YD2600BBAFBOX
116 Review
Deepcool GAMMAXX 300 CPU cooler, silver/black/blue
166 Review
MacBook Retina 13-inch (A1425, A1502) and 🔩 15-inch (A1398) Bottom Case Screw Set with Pentalobe Screwdriver
11 Review
🔧 Premium Repair Replacement Screws & Tools for MacBook Pro Retina 15"/13" - Complete Bottom Case Set
10 Review
36-Pack Black Rubber PC CPU/Case Fan Screws/Rivets Set for Computer
11 Review
M.2 Screw Kit: Easy Mounting for NVMe SSDs on ASUS Motherboards
19 Review