Should I block it?

No, this file is 100% safe to run.

VersionsAdditional versions

4.20.0 6.82%
4.0.4 2.27%
4.0.2 63.64%
3.80 25.00%
3.71 2.27%

Relationships

Unrar.dll

RAR decompression library by Download Master (Signed)

Remove Unrar.dll
Version:   4.0.4
MD5:   c0ba0003cb354093cedb27a991ad0702
SHA1:   349bf46e2935bcd8f43923029f5309545274224f
SHA256:   8a94325adca2351352029604dadef4803acd3cf153bcbbbf6276aaa7e4dfb578

What is Unrar.dll?

RAR decompression library is a free software decompression library called "unrarlib", licensed under the GPL, based on an old version of unrar with permission from the author Eugene Roshal, but it can only decompress archives created by RAR versions up to 2.x. Archives created by RAR 2.9 and later (which are most RAR archives found today) use a different format which is not supported by the free library.

About Unrar.dll (from Download Master)

The RAR compression utility is proprietary, with a closed algorithm. RAR is owned by Alexander L. Roshal is based on Lempel-Ziv (LZSS) and prediction by partial matching (PPM) compression.

Overview

unrar.dll is loaded as dynamic link library that runs in the context of a process. It is installed with a couple of know programs including AllDup 3.4.12 published by Michael Thummerer Software Design, Trilix from TrilixP2P LLC and Trilix by TrilixP2P LLC. The file is digitally signed by Download Master which was issued by the VeriSign certificate authority (CA).

DetailsDetails

File name:unrar.dll
Publisher:Alexander Roshal
Product name:RAR decompression library
Typical file path:C:\Program Files\iobit\iobit malware fighter\unrar.dll
File version:4.0.4
Size:171.5 KB (175,616 bytes)
Certificate
Issued to:Download Master
Authority (CA):VeriSign
Digital DNA
Entropy:6.495456
File packed:No
.NET CLR:No
More details

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Windows OS versionsDistribution by Windows OS

OS versiondistribution
Windows 7 Ultimate 25.00%
Windows 7 Home Premium 20.45%
Microsoft Windows XP 15.91%
Windows 7 Ultimate N 11.36%
Windows Vista Home Premium 9.09%
Windows 7 Professional 4.55%
Windows 8 Pro 4.55%
Windows 8 2.27%
Windows 7 Home Basic 2.27%
Windows XP Professional 2.27%
Windows 8 Single Language 2.27%

Distribution by countryDistribution by country

United States installs about 20.51% of RAR decompression library.

OEM distributionDistribution by PC manufacturer

PC Manufacturerdistribution
Acer 37.50%
Dell 25.00%
Lenovo 8.33%
ASUS 8.33%
Sony 8.33%
Toshiba 8.33%
Hewlett-Packard 4.17%
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