My suggestion to those who are planning on upgrading their operating system, before starting the process:
- Make sure your system is free off malicious software (this is extremely important)
- Cleanup temp/junk files by running a trusted app
- If a HD encryption software was installed, make sure to decrypt the encrypted partitions/drives
- If above steps are completed, schedule/run scandisk first, and then defrag on all drive(s) connected (never run defrag on any encrypted partitions/drives!)
THEN (if applicable):
- Uninstall a real-time AV/Malware scanner if installed
Additionally, much like doing a system restore or re-imaging, disconnect any and all external devices, removable media, etc. that is not needed.
So, if you have any USB/flash drives connected or CD/DVD in the drive, remove them to minimize the chance of having any issues.
That is what I would recommend...