That is a new one, never heard of that problem before.
I always thought switching from IDE to AHCI cause issues at boot (never had to try it but reading others various reports).
I vaguely remember having to edit registry first and then switching.
Yes if you don't do the switch correctly you can't boot into windows then at all unless you clean boot your system or switch back to IDE mode. There are three ways to do switch from IDE to AHCI and that's
1. do a clean boost (reinstall the whole OS) after switching your SATA over to AHCI.
2. do a registry edit to allow AHCI mode, have to do registry edit before going into BIOS (and have to go into bios before windows loads on restart) or switching from IDE to AHCI will cause you to have issues.
3. Turn on boot into safe mode and then jump into your bios and switch to AHCI before windows starts loading and then after that let it go into safe mode and then turn safe mode off and restart again back to normal windows.
Those are at least 3 ways I know of that'll allow you to switch from IDE to AHCI or do the reverse, 2 of them allow you to do it without a clean install, and the first one well it is a clean install.
Either way I'm still having the issue with process Lasso showing higher numbers than should be, even after multiple restarts and such.