Vopt is a well-known, safe, and fast defragger for Windows. Previously shareware the author has provided a free serial number for everyone before he passed away.
The author of this program said just before he died he wanted to make this free so here is how to enjoy this program with no limitations forever:
1: Extract Vopt9.zip and you will have two files; Vopt921.exe and Vopt9reg.txt
2: Double-click Vopt921.exe to install the 30-day trial.
3: Copy the Vopt9reg.txt to where it was installed which should be:
C: > Program Files (x86) > Golden Bow > Vopt 9
4: Open Vopt9reg.txt from the Vopt 9 Directory, leave it open and startup Vopt 9 Note: Some people had difficulty, myself included getting this to work correctly. We've included a "Vopt9reg2.txt" to use if "Vopt9reg.txt" fails.
5: Go to Help > About Vopt and click on Register.
6: Restart the program and enjoy courtesy of the late author.