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CCleaner 2.27 and later can wipe the MFT free space of a drive, or the entire drive. CCleaner can uninstall programs or modify the list of programs that execute on startup. [11] Since version 2.19, CCleaner can delete Windows System Restore points. CCleaner can also automatically update installed programs and computer drivers. [12] [13]
Microsoft Windows Malicious Software Removal Tool (MSRT) is a freeware second-opinion malware scanner that Microsoft's Windows Update downloads and runs on Windows computers each month, independent of the installed antivirus software. First released on January 13, 2005, [2] MSRT does not offer real-time protection.
Windows Update MiniTool (also called WUMT) is a freeware application client created by a Russian programmer named stupid user, and was released in 2015.It is an alternative to Windows Update for the Microsoft Windows operating systems by allowing users to search, install, postpone, and disable updates.
Windows Update Agent on Windows 10 supports peer-to-peer distribution of updates; by default, systems' bandwidth is used to distribute previously downloaded updates to other users, in combination with Microsoft servers. Users may optionally change Windows Update to only perform peer-to-peer updates within their local area network. [27]
A poorly designed Registry cleaner may not be equipped to know for sure whether a key is still being used by Windows or what detrimental effects removing it may have. This may lead to loss of functionality and/or system instability, [3] [4] [5] As well as application compatibility updates from Microsoft to block problematic Registry cleaners. [6]
"Because the new services and technologies draw information and updates from a single source—the Microsoft Update catalog—and use a common polling engine (provided by the new Windows Update Agent), our customers will have a much more integrated and reliable update management process." [3]
When major maintenance such as patching is performed, a backup is recommended as the first step in case the update fails and reversion is required. Disk cleanup may be performed as regular maintenance to remove these. Files may become fragmented and so slow the performance of the computer.
CCleaner is a popular tool used to clean potentially unwanted files from Windows computers, widely used by security-minded users. The distributed installer binaries were signed with the developer's certificate making it likely that an attacker compromised the development or build environment and used this to insert malware.