If the drive you are installing to is failing (see Method 4), try installing the software to a different drive (e.g., from Drive C: to Drive D:).
: Your system lacks enough "working space" to unpack massive files. unarc.dll returned an error code -11
If re-downloading and disabling antivirus doesn't work, the issue may be your computer's memory. Decompressing large files requires sustained RAM usage. If the drive you are installing to is
If you’ve been trying to install a game or a large software archive (usually a .exe setup compressed with ), you might have run into this frustrating popup: unarc.dll returned an error code -11