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It sure reads like you can Delete this Folder’s Contents – BUT a little disconcerting that Disk Cleanup pays no attention to this much Temp excess. I even have 555 MB of Temp Files that Disk/System Cleanup repeatedly fails to Remove although box Chk’d – but no biggie Vs 27 GB.
Will appreciate a confirmation that RUN — %temp%– Results (~admin\AppData\Local\Temp) can be Deleted.
W10 Pro 22H2 / Hm-Stdnt Ofce '16 C2R / Macrium Pd vX / GP=2 + FtrU=Semi-Annual + Feature Defer = 1 + QU = 0
Hi CraigS26 / Zig:
If I run a Custom Clean with CCleaner Free and click the blue Analyze button while System – Temporary Files is enabled it often finds 100’s of MBs of files to clean on my Win Pro machine. When I double-click System – Temporary Files in the summary to preview the files that are going to be cleaned (i.e., before I click “Run Cleaner”) and sort by file size I can see the majority of the larger files are located in C:\Users\<myusername>\AppData\Local\Temp, and most of those temp files appear to be created by my MS Outlook 2019 email client.
I run CCleaner Free about once a week and deleting those System – Temporary Files in C:\Users\<myusername>\AppData\Local\Temp has never caused a problem. Note that I’m fairly cautious about what I allow CCleaner to clean (for example, I don’t let it clean anything in my default Firefox browser) and as a general rule I don’t use the registry cleaner unless remnants of an uninstalled programs are causing problems.
I prefer to use the Portable build of CCleaner Free instead of installing the program on my hard drive. I download the ccsetup5xx.zip file from https://www.ccleaner.com/ccleaner/builds, unzip to any location (I unzip in a folder called CCCleaner on a removable USB stick), and then double-click the appropriate executable (CCleaner.exe for a 32-bit OS, CCleaner64.exe for a 64-bit OS) to run. Any configuration changes will be saved in a file called ccleaner.ini and whenever I unzip a new version of CCleaner I copy over my old ccleaner.ini file to retain my settings.
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Dell Inspiron 5584 * 64-bit Win 10 Pro v21H2 build 19044.1586 * Firefox v98.0.2 * Microsoft Defender v4.18.2202.4-1.1.19000.8 * Malwarebytes Premium v4.5.7.186-1.0.1645 * MS Office Home and Business 2019 (Version 2202, Build 14931.20132 Click-to-Run) * CCleaner Free Portable v5.90.9443
SpaceSniffer shows 511 Mb.
I reran the Properties of AppData/Local/Temp, and it gave me a similar size. When I ran it earlier, it indicated the folder being examined was Local, thus the above post.
Zig
Yep. File Explorer will not delete anything that is in use.
--Joe
Me, again:
Just to make sure I wasn’t crazy before, I again went to Users, selected my name, clicked on AppData, selected Local, then right-clicked on Temp and selected Properties 
Here’s a screenshot of what I got, but note the folder selected at the top.
Zig
Hi Zig:
Your image in post # 2437110 looks like you checked the size of C:\Users\<yourusername>\AppData\Local, not the Temp subdirectory at C:\Users\<yourusername>\AppData\Local\Temp.
I cleaned my temp folders with CCleaner today and then checked my folder sizes. C:\Users\<myusername>\AppData\Local was 1.83 GB while C:\Users\<myusername>\AppData\Local\Temp still had ~ 147 MB of data.
I browsed inside C:\Users\<myusername>\AppData\Local\Temp and all the remaining files had a Date Modified of 04-Apr-2022 or 05-Apr-2022, so it’s normal that these files would not be cleaned today because my CCleaner setting at Options | Advanced | Only Delete Files in Windows Temp Folders Older Than 24 Hours is ENABLED.
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Dell Inspiron 5584 * 64-bit Win 10 Pro v21H2 build 19044.1586 * Firefox v98.0.2 * Microsoft Defender v4.18.2202.4-1.1.19000.8 * Malwarebytes Premium v4.5.7.186-1.0.1645 * CCleaner Free Portable v5.90.9443
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