#1 BEST
CCleaner

CCleaner

Gen Digital Inc.
Freeware v6.39.0.11548
4.8
4 reviews

CCleaner is a system cleaning tool for Windows that removes temporary files, browser cache, cookies, and other junk that builds up over time. It also includes a registry cleaner, a startup manager, an uninstaller, and a duplicate file finder. The free version covers the basics; C...

14 downloads
Windows 7/8/10/11/ARM
Official source
#2 GREAT
Glary Utilities

Glary Utilities

Glarysoft Ltd
Proprietary v6.40.0.44 27MB
4.5
6 reviews

Glary Utilities is a system optimization suite for Windows that bundles disk cleanup, registry repair, startup management, duplicate file detection, and over a dozen other maintenance tools in a single interface. The free version handles most tasks. The Pro upgrade adds scheduled...

11 downloads
Windows XP/Vista/7/8/10/11
Official source
#3 SOLID
Advanced SystemCare

Advanced SystemCare

IObit
Freeware v19.3.0.200 65MB
4.3
3 reviews

Advanced SystemCare is a system optimization tool by IObit that cleans junk files, fixes registry errors, and manages startup programs. The free version handles basic cleaning. The Pro version costs $16.77 per year and adds deeper optimization, a privacy shield, and automatic mai...

17 downloads
Windows XP/Vista/7/8/10/11
Official source
#4
AdwCleaner

AdwCleaner

Malwarebytes
Freeware v8.7.1.626 8.6MB
4.5
4 reviews

AdwCleaner is a free malware removal tool now owned by Malwarebytes. It targets adware, browser hijackers, unwanted toolbars, and PUPs (potentially unwanted programs) that sneak in with other software installations. The program is portable - no installation needed - and weighs un...

15 downloads
Windows 10/11/ARM
Official source
#5
Defraggler

Defraggler

Piriform
Proprietary v2.22 6.1MB
5.0
6 reviews

Defraggler is a free disk defragmentation tool from Piriform, the company behind CCleaner. Unlike the built-in Windows defragmenter, Defraggler lets you defragment individual files instead of forcing you to process an entire drive. It displays a color-coded drive map that shows e...

15 downloads
Windows XP/Vista/7/8/10
Official source
#6
Smart Defrag

Smart Defrag

IObit
Freeware v11.3.0.476 14.7MB
4.7
3 reviews

Smart Defrag is a disk defragmentation tool by IObit that reorganizes fragmented files on traditional hard drives. The free version covers basic defragmentation and scheduling. The Pro version costs $19.99 per year and adds SSD optimization with TRIM, boot time defrag, and priori...

15 downloads
Windows XP/Vista/7/8/10/11
Official source
#7
Revo Uninstaller

Revo Uninstaller

VS Revo Group, Ltd.
Freeware v2.6.8 7.1MB
4.4
5 reviews

Revo Uninstaller is a program removal tool for Windows that goes beyond the standard uninstaller by scanning for and deleting leftover files, folders, and registry entries. Available in a free version with core functionality and a Pro version with forced uninstall, batch uninstal...

28 downloads
Windows 7/8/10/11
Official source
#8
IObit Uninstaller

IObit Uninstaller

IObit
Freeware v15.4.0.1 33MB
4.6
7 reviews

IObit Uninstaller is a program removal tool by IObit that does what Windows Add/Remove Programs does, except it also cleans up the leftover files and registry entries that the built-in uninstaller misses. The free version handles basic uninstalls with residual cleanup. The Pro ve...

16 downloads
Windows XP/Vista/7/8/10/11
Official source
#9
IObit Malware Fighter

IObit Malware Fighter

IObit
Freeware v13.2.0.1635 60MB
4.0
4 reviews

IObit Malware Fighter is an anti malware tool by IObit that scans for and removes malware, ransomware, and spyware. The free version uses IObit's own detection engine. The Pro version (around $20/year with discounts) adds the Bitdefender engine and claims access to over 200 milli...

13 downloads
Windows XP/Vista/7/8/10/11
Official source