He spent the next hour in the Command Prompt, sweating under the glow of his monitor. He tried
Third-party uninstaller utilities (such as Revo Uninstaller, Geek Uninstaller, or IObit Uninstaller) are designed to handle such broken uninstallations. These programs can scan for leftover files and registry entries even when the native uninstaller fails. They often force-remove the program’s folder and clean the registry without relying on the missing .dat file.
A partially written or corrupted unins000.dat file (e.g., due to an improper shutdown, disk error, or malware infection) will cause the uninstaller to throw this error. Sometimes the file exists but has a file size of 0 KB—this is unreadable. unins000.dat could not be opened cannot uninstall
That’s when the fans started spinning faster. High-pitched. Manic.
If unins000.dat is corrupted due to bad sectors on your hard drive, you may need to repair the disk. He spent the next hour in the Command
If the uninstaller refuses to work and you cannot repair it, you can manually delete the program and then scrub its registry entries. This is a because it leaves orphaned registry data, but it is effective.
It sounds counterintuitive, but the most effective way to fix a broken uninstaller is to . They often force-remove the program’s folder and clean
: This is widely recommended for stubborn apps. It runs the program's own uninstaller first, but then performs a deep scan to delete anything left behind, regardless of whether the .dat file is missing.
To avoid this error in the future, users should: