samule
1
The Defrggler 1.21 always closes without finishing defraggling process & asks to report the error to microsoft.
Which I've done numerous occasions.
Up till Defraggler 1.20 everything was woking fine.
Is it possible to change back to Defraggler 1.20?
Yes. Defraggler 1.20 and prior versions are available at FileHippo.
Could you try running defraggler in debug mode and attaching the log in a post here
http://www.piriform.com/docs/defraggler/troubleshooting/running-defraggler-in-debug-mode
If you don't feel up to doing that, have you tried completely uninstalling Defraggler and starting with a fresh install?