CCleaner是一款免費的系統優化和隱私保護工具。CCleaner的主要用來清除Windows系統不再使用的垃圾文件，以騰出更多硬盤空間。它的另一大功能是清除使用者的上網記錄.CCleaner的體積小，運行速度極快，可以對臨時文件夾、歷史記錄、回收站等進行垃圾清理，並可對註冊表進行垃圾項掃描、清理。附帶軟件卸載功能。

系統垃圾清理利器CCleaner現已更新至v5.49.6856，添加並改進了對公共語言運行時（CLR）文件夾的清理，擴展了Windows錯誤報告臨時文件夾的清理，修復了導致某些用戶損壞配置文件的Firefox清理規則。

5.51.6939 (13 Dec 2018)

Subscriptions 
– Added ‘Subscription Management’ button 
– Minor usability improvements to the ‘License Information’ panel

General 
– Updated a website link to use HTTPS 
– Added new translations for software update notifications

CCleaner v5.49.6856

We’re pleased to announce the latest release of CCleaner for Windows.

In this release, we’ve improved Windows Log Cleaning and Firefox cleaning.

Windows and Browser Cleaning

• Added and improved cleaning to the Common Language Runtime (CLR) folders
• Extended the cleaning of Windows error reporting temporary folders
• Fixed Firefox cleaning rules which were causing corrupted profiles for some users

General

• Minor bug fixes
• Small UI improvements

CCleaner v5.49.6856

We’re pleased to announce the latest release of CCleaner for Windows。In this release, we’ve improved Windows Log Cleaning and Firefox cleaning.

Windows and Browser Cleaning

• Added and improved cleaning to the Common Language Runtime (CLR) folders
• Extended the cleaning of Windows error reporting temporary folders
• Fixed Firefox cleaning rules which were causing corrupted profiles for some users

General

• Minor bug fixes
• Small UI improvements

v5.48.6834 (25 Oct 2018)
Browser Cleaning 
– Added workaround for cleaning Edge while in the ‘suspended’ state on Windows 10 , build 1809. – This workaround is temporary while we consider a more permanent solution. 
– Fixed cleaning of Edge cookies in Windows 10 
– Fixed a bug where cleaning Firefox Internet History would corrupt the profile

Feature Previews 
– Added support for ‘feature previews’ (limited release of features in development) 
– Keep your eyes peeled for forthcoming feature previews!

General 
– Renewed our digital security certificate as the previous one was due to expire. 
– The certificate publisher has been updated from ‘Piriform Ltd.’ to ‘Piriform Software Ltd.’

ССlеаnеr 5.44.6575 Fіnаl:
– Іntеrnеt Ехрlоrеr сооkіеѕ аrе nоw сlеаnеd frоm thе ІNеtСасhе fоldеr іn Wіndоwѕ 10 
– Fіхеd а bug саuѕіng сlеаnіng іnсоmраtіbіlіtу wіth Fіrеfох Маlwаrеbуtеѕ ехtеnѕіоn 
– Аddеd rеmіndеrѕ fоr ехріrеd ССlеаnеr Рrоfеѕѕіоnаl ѕubѕсrірtіоnѕ

5.42.6499
IMPORTANT FIX FOR CHROME 
Browser Cleaning
– Fixed a critical issue where very long float values were saved in scientific format, causing the Chrome profile to be lost 
– Fixed a critical issue where systems using non-standard decimal separators caused data to be stored incorrectly, causing the Chrome profile to be lost

v5.42.6495 
Browser Cleaning

• Internet Explorer: Fixed a bug where cleaning Temporary Internet Files left some files behind
• IE/Edge: Enhanced cleaning of YouTube viewing history (thanks alhazred  for reporting this!)

Cookies

• Search terms are now  highlighted  in the results list

General

• Where appropriate, CCleaner Free may recommend improvements to your system’s antivirus protection

Installer

• Fixed an issue where localized text was overlapping in the Professional Edition installer

v5.41.6446 (13 Mar 2018) 
UI
– NEW! Cleaning results now displayed as a Cleaning Summary (Free and Professional versions only) 
– NEW! Product tips to help users discover less visible features 
– NEW! Fresh, clean Upgrade page design 
Browser Cleaning
– Edge/Internet Explorer: Fixed cleaning of cookie and icon file types on Windows 10 (thanks alhazred & Judesman for reporting this via our forum!) 
Localization
– Added improved Estonian translations (thanks to our volunteer translator ProPaan!) 
Technology
– Added support for Sciter: a lightweight, embeddable HTML/CSS/script engine for modern UI development

v5.39.6399 (16 Jan 2018)
Disk Analyzer 
– Fixed a rare crash where a UI layer was still active 
General 
– Minor user interface improvements 
– Minor bug fixes

v5.38.6357 (12 Dec 2017) 
Browser Cleaning
– Edge: Session clean no longer removes set-aside tabs 
– Chrome: Added support for cleaning cookies from Local Storage 
Cookies
– Chrome Local Storage Cookies can now be managed from Cookie Manager 
Windows
– CCleaner no longer cleans the list of files waiting to be renamed 
Installer
– Fixed ‘Error opening file for writing’ error 
General
– Fixed a library dependency that was preventing CCleaner from opening on Wndows XP in some cases 
– Fixed a rare case where CCleaner could check for updates multiple times in a short space of time

CCleaner 5.37.6309 Final更新記錄：
Browser Cleaning
Edge: Session clean no longer removes set-aside tabs 
Firefox: Fixed an issue where some favicons were still being cleaned

CCleaner 5.36.6278 Final更新記錄：
Browser Cleaning
Firefox: updated Session cleaning rule to support changes in Firefox 56.0 
Chrome (and Chromium): updated Internet History cleaning rule to clean user activity data 
Opera: updated Internet History cleaning rule to clean user activity data

Default Cleaning Rules
Windows Explorer: Most Recently Used documents and other MRU files no longer cleaned by default 
Windows Defender: Scan history no longer cleaned by default 
Microsoft Office: MRUs no longer cleaned by default 
Edge, Chrome/Chromium, Firefox, Opera, Safari, Thunderbird: Current session data no longer cleaned by default

Emergency Updater
Added new executable: “CCUpdate.exe” 
Added new Windows Scheduled Task: “CCleaner Update”

CCleaner v5.35.6210 Final更新記錄：
– All builds signed with new Digital Signatures

CCleaner v5.34.6207 Final更新記錄：
Browser Cleaning
– Firefox: Internet History cleaning rule no longer removes Favicon content 
General
– Minor GUI improvements 
– Minor bug fixes

CCleaner v5.33.6162 Final更新記錄：
Settings
– Fixed an issue where Automatic Update continued to inform users of an existing update after the setting had been disabled 
Browser Cleaning
– Updated Edge cookie cleaning definitions to include new tables from Microsoft 
– Fixed an issue in Firefox where extensions could not be deleted due to withdrawal of support for Netscape Plugin API 
– Fixed an issue in Firefox & Thunderbird where cleaning ‘Site Preferences’ would also clean ‘Last Download Location’ 
Browser Plugins
– Browser Plugins list now saved as browserplugins.txt ( not startup.txt) 
Disk Analyzer
– Fixed an issue where analysis results did not display the full filepath 
Stability
– Improved CCleaner launch sequence to resolve a UI lock

CCleaner 5.32.6129 Final更新記錄：
Browser Cleaning

• Updated Firefox History cleaning definitions to correctly remove items with associated favicons
• Updated Chrome History cleaning definitions to restore removal of ‘Other Search Engines’
• Restored support for cleaning ‘Last download location’ in Edge
• Restored support for cleaning ‘Last download location’ in Firefox

Windows Cleaning

• ‘Recent Documents’ rule no longer removes items that have been ‘pinned’ in MS Office applications

CCleaner 5.31.6104 Final 更新記錄：

– Improved Windows 10 Creators support 
– Improved Firefox History cleaning 
– Improved Chrome Cache and History cleaning 
– Optimized Scheduling functionality (Professional only) 
– Improved high-DPI support 
– Minor GUI improvements 
– Minor bug fixes

官網地址： https://www.ccleaner.com

官網更新記錄： https://www.ccleaner.com/news/release-announcements

軟件下載地址: 

http://download.piriform.com/ccsetup551.exe

CCleaner 5.51.6939 Professional/Business/Technician多語言中文註冊版下載地址：

链接：https://pan.baidu.com/s/1Vn_hx-P3E4-lMtkFuR7jEQ 提取码：8ivk