Windows Vista Registry Cleaner - Instant Registry Repair. Scan and Fix Errors in Seconds! If your Windows Vista system is performing slowly on your PC, or if you are getting error messages that say "registry error", then you need to scan and repair your registry files. This free scan will immediately locate the problems in Vista's registry and isolate them for repair. Simply use the demo version for limited repair or upgrade for a full system clean (recommended). Download & Scan Now!