You clicked for a "fix," so here is the actual solution. You can be watching the movie in 4K (or HD) within 5 minutes using legal methods that don't require a VPN or a virus scan.
One of the reasons people search for a "Filmyzilla fix" is to download the movie to watch offline without buffering. Thankfully, legal apps offer this feature. the hangover part 1 filmyzilla fix
Step-by-Step Legal Offline Fix:
The "fix" you find on Filmyzilla is rarely the 1080p Blu-ray version. You will likely get: You clicked for a "fix," so here is the actual solution