joe90

Hello mta, thank you for your reply. I understand that indeed there is no point in defragmenting an SSD drive but defraggler also has an Optimise function for SSDs - so that is useful. Also I use the SSD as my C:Drive which contains the OS and application/program files. I keep all my Data on a separate HDD so that is why I want to use defraggler. Regarding the BSOD issue - as I said in my original post since re-installing defraggler I don't get the BSOD BUT the system freezes and I have to use the big off button.

Hello I've just cloned a HDD to a 480gb Sandisk SSD and replaced the said HDD in my windows 7 ultimate Dell PC. Defraggler worked perfectly on the HDD but now BSOD on the SSD. I've uninstalled and re-installed but this just freezes the system. Otherwise the system is working well. I've installed a Samsung SSD on a different PC. and defraggler works well with that system. Any suggestions?