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檔，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的的體積小，運行速度極快，可以對臨時檔夾，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）檔夾的清理，擴展了Windows錯誤報告臨時檔夾的清理，修復了導致某些用戶損壞設定檔的火狐清理規則。

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

CCleaner 5.30.6065 Final 更新記錄：

– Improved Edge Cookie cleaning
– Updated Internet Explorer 10 and 11 History cleaning
– Updated Thunderbird 52 History cleaning
– Updated Windows Explorer MRU Cache cleaning
– Improved SSD detection algorithm
– Optimized Update Checking process
– Minor GUI improvements
– Minor bug fixes

CCleaner 5.30.6063 更新記錄：
– Improved Edge Cookie cleaning
– Updated Internet Explorer 10 and 11 History cleaning
– Updated Thunderbird 52 History cleaning
– Updated Windows Explorer MRU Cache cleaning
– Improved SSD detection algorithm
– Optimized Update Checking process
– Minor GUI improvements
– Minor bug fixes

CCleaner 5.29.6033 Final 更新記錄：
– Improved Windows 10 Creators Update compatibility
– Updated Edge History and Session cleaning
– Updated Internet Explorer 10 and 11 Cache cleaning
– Updated Firefox History and Cache cleaning
– New Scheduling section (Professional only)
– Updated various languages
– Minor GUI improvements
– Minor bug fixes

CCleaner 5.28.6005 更新記錄：
– Improved Chrome and Opera History cleaning
– Improved Firefox Session and Cache cleaning
– Updated Windows Explorer MRU cache cleaning
– Improved 64-bit build architecture on Windows 10
– Optimized Auto Update process (Professional only)
– Updated ZoneAlarm cleaning
– Minor GUI improvements
– Minor bug fixes

CCleaner 5.27.5976 更新記錄：
– Improved Firefox and Chrome History cleaning
– Improved Opera Beta cleaning
– Improved Windows 10 Support
– Improved Uninstall tool version sorting
– Updated internal architecture
– Added Foxit Reader 8.0 cleaning
– 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

軟體下載位址: 

http://download.piriform.com/ccsetup549.exe

CCleaner 5.49.6856 Professional/Business/Technician多語言中文註冊版下載地址：
連結：https://pan.baidu.com/s/1U797pP7nZGBIZwiMyMb83Q 提取碼：3y7a

註冊碼：斷網註冊，輸入註冊碼
C2YW-VXVH-Z7RD-RMJZ-8ZPC
C2YW-WNVI-AYRY-M24E-8ZPC
C2YW-2IWJ-ZGGS-G4AI-AZPC
C2YW-VAH5-3RN9-4U76-SZPC
C2YW-XTRM-B6GM-HPV2-EZPC