ccleaner.exe is a application which is probably legit. So, if ccleaner.exe is on your system, it is probably ok, and will NOT cause problems. Even if your PC is virus-free, it is still recommended to purchase a good antivirus with a good track record, in order to yourself your PC against viruses and malware.
Normally, this program is stored in C:\Program Files\CCleaner\CCleaner.exe.
The MD5 checksum for this program is 3b2336a8281abe998d156b580d6fac4f.
This application does NOT operate as a Windows service. This is normally a good sign.
This application uses the Internet to communicate. Today this is expected from a program. For example, most of the apps on your computer check for new updates. For this, Internet communications are required.
This executable runs in 32-bit mode. It does not use the entire set of features of current PC processors. This is quite normal because the makers did not bother to upgrade it to 64-bit code.
The description stored in the exe is CCleaner.
File version extracted from the file 5, 27, 00, 5976.
Company Piriform Ltd.
Legal copyright notice Copyright © 2005-2017 Piriform Ltd.
This exe does NOT have visible windows. This is most likely a bad thing.
Some dangerous functions of the Operating System have been used, such as functions for intercepting the keyboard. We recommend you to read more about this program.
ccleaner.exe is digitally signed. Today most serious programs are digitally signed.
The digital signature found in ccleaner.exe checks out perfectly. This is very good.
Digitally signed by: Piriform Ltd
Certificate's issuer name: Symantec Class 3 SHA256 Code Signing CA
This program is registered to start when the computer starts. Yes
It has an uninstall routine, which is a good sign. si are uninstall.