As for slow SSD, you can try the following methods to check if it can be fixed.
1.disable Hibernation, enter the command prompt window by clicking the Start button and type cmd (please run as administrator), and type command powercfg.exe /hibernate off and press Enter.
2.Make SATA controller runs in AHCI mode
AHCI (Advanced Host Controller Interface) Mode does a fabulous job of keeping the high performance of solid state drive. So when it is disabled, the SSD might run slow and take a very long time to respond. It is better to set your SSD mode from IDE to AHCI.
Press WIN+Rand type msconfig and then press Enter.
Under Boot tab, tick Safe boot, click OK to save the changes, and reboot your computer into safe mode by constantly pressing F2 or DEL (the key to press varies between systems). Change your SATA mode from IDE to AHCI. Then save settings to exit and reboot.
Windows will boot in safe mode this time. Run msconfig again, and untick Safe boot option Boot tab under and restart your computer.
If the problem is still existing, maybe you need to align the partitions, or completely erase the SSD to restore its performance. Then i bet you can easily fix