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Solved Should I delete leftover registry entries


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156
#1
Hello,
As I using Windows long time and have uninstall and install many apps and the uninstalled apps left some registry entries, most of the entries is under HKEY_Current_User\Software and HKEY_Local_Machine and many keys name is same as the uninstalled apps, does it is safe to delete the entries?
 

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Addictive Gamer

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#2
I sometimes encountered problems re-installing applications after normal uninstall and manual registry key deletions of same applications.

Could be because these keys can be associated with files which are still present in program files folder and other locations, so deleting these folders is what I would do. but still re-installation could be incomplete some times.
 

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MilesAhead

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#4
I have had very good luck using CCleaner

Before cleaning the Registry it is a good idea to make several backups. I make a Restore Point. CCleaner offers to make a backup .reg file(I advise doing this.) Also there are Registry backup freeware programs such as ERUNT and Registry Backup among others.

Once you are backed up with the 3rd party programs and/or a Restore Point I would run CCleaner and use the Registry cleaner tool. I have used CCleaner steadily the last few years. There was one version that had a bug in the Registry cleaner. The next update it was fixed. It worked so well I got complacent and didn't save the .reg file before doing the clean. Fortunately I had a Restore Point. But I haven't had any issues with it since. Now I just make backups to the Registry just in case. I make a backup every day just in case some minor corruption happens I can set it straight.

CCleaner is very good at getting rid of dead file associations. That's one very good reason to use it. If I uninstall something like an AV program that doesn't always clean up all its data during uninstall, I run CCleaner Registry clean after the uninstall to clean out the crap. :)

Also it never hurts to have a backup imaging tool to recover from a system that won't boot from the HD. There are many excellent free and paid ones these days. I use Macrium Reflect to image my system partition. But there are several free ones listed here:
TheFreeCountry disk utilities
 

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#5
Thank you. So should I delete the entries directly in regedit or delete it in ccleaner because ccleaner will not delete the whole entries?
 

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Addictive Gamer

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#6
Thank you. So should I delete the entries directly in regedit or delete it in ccleaner because ccleaner will not delete the whole entries?
In either case you have to accept the risk, and possibly copy/paste registry key locations into google to learn more what these keys do, at least it will give you some confidence.
 

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MilesAhead

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#7
Thank you. So should I delete the entries directly in regedit or delete it in ccleaner because ccleaner will not delete the whole entries?
In either case you have to accept the risk, and possibly copy/paste registry key locations into google to learn more what these keys do, at least it will give you some confidence.
+1 CCleaner is safer. But you learn by doing. The main thing when you experiment is to leave yourself methods to bail yourself out of mistakes. We all make them. Just try to make sure you can recover from them if necessary. :)
 

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TairikuOkami

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#9
CCLeaner is safe, because it does not delete much, if you use more aggressive registry cleaner, it will clean more, but obviously, there is a better chance, that something will go wrong. I use WiseCare' registry cleaner for years (freeware), it is safe and creates backups. You can give it a try. But for the future, it is better to use an uninstaller, rather then a registry cleaner, even though there are risks involved as well.

http://www.eightforums.com/performa...-deletes-all-traces-uninstalled-programs.html
 

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MilesAhead

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#11
If you consider this thread resolved please mark it as Solved. :)
 

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#12
I've used both Auslogics and Wise Registry Cleaners, cautiously, sparingly, and so far so good!
 

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CountMike

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#14
You never said if any of those entries are causing you any troubles. Starting with Win7, registry is used different way than before, no more reading from it continually but using only what's needed at the time. Cleaning, defragmenting and compacting is not really needed any more.
Using some good uninstall program like Revo will keep it much cleaner than normal windows uninstall.
 

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TairikuOkami

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#15
Windows task optimization called boot defrag is actually a registry defragmentation, not HDD related.
 

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Cliff S

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#16
Windows task optimization called boot defrag is actually a registry defragmentation, not HDD related.
Wrong:
The Prefetch directory has one additional salutary function when used in conjunction with the built-in defragmenting tool. Every three days, during idle times, this utility rearranges program code, moving it to the outside of the disk to make it more efficient when loading (to force Windows to perform this optimization without having to do a full defragmentation, use the Defrag.exe command with the -b switch. For instance: defrag c: -b).
 

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TairikuOkami

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#17
That does not correspond with my findings. :think:
 

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Cliff S

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#18

My Computer

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  • OS
    Windows 8.1 Update Pro in Hyper-V/Windows 10 Pro 64 bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Cliff's Black & Blue Wonder
    CPU
    Intel Core i9-9900K
    Motherboard
    ASUS ROG Maximus X Hero
    Memory
    32 GB Quad Kit, G.Skill Trident Z RGB Series schwarz, DDR4-3866, 18-19-19-39-2T
    Graphics Card(s)
    ZOTAC GAMING GeForce RTX 2080 Ti AMP! Extreme Edition
    Sound Card
    (1) HD Webcam C270 (2) NVIDIA High Definition Audio (3) Realtek High Definition Audio
    Monitor(s) Displays
    BenQ BL2711U(4K) and a hp 27vx(1080p)
    Screen Resolution
    1920 x 1080 x 32 bits (4294967296 colors) @ 60 Hz
    Hard Drives
    C: Samsung 960 EVO NVMe M.2 SSD
    E: & O: Libraries & OneDrive-> Samsung 850 EVO 1TB
    D: Hyper-V VM's -> Samsung PM951 Client M.2 512Gb SSD
    G: System Images -> HDD Seagate Barracuda 2TB
    PSU
    Corsair HX1000i High Performance ATX Power Supply 80+ Platinum
    Case
    hanteks Enthoo Pro TG
    Cooling
    Thermaltake Floe Riing RGB TT Premium-Edition 360mm and 3 Corsair blue LED fans
    Keyboard
    Trust GTX THURA
    Mouse
    Trust GTX 148
    Internet Speed
    25+/5+ (+usually faster)
    Browser
    Edge; Chrome; IE11
    Antivirus
    Windows Defender of course & Malwarebytes Anti-Exploit as a
    Other Info
    Router: FRITZ!Box 7490
    Sound system: Philips Soundbar HTL2160 w/subwoofer

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