how to Fix Low Disk Space in Windows | C Drive Clean, SSD Scan & Speed Test - Latest Breaking News & Trending Stories

If your laptop is slow, showing low disk space on the C drive, or you want to optimize SSD performance, this complete guide will help you step by step using built-in Windows tools only. No third-party software required.

Contents

Step 1: Check Low Disk Space on C Drive

Low disk space can cause slow performance, app crashes, and Windows update errors.

wmic logicaldisk get size,freespace,caption

This command shows total size and free space of all drives.

Step 2: Clean Junk & Unusable Files from C Drive (Safe)

Clean Temporary Files

del /s /q %temp%\*
rd /s /q %temp%

Clean Windows Temporary Files

del /s /q C:\Windows\Temp\*
rd /s /q C:\Windows\Temp

Clean Windows Update Cache

net stop wuauserv
net stop bits
rd /s /q C:\Windows\SoftwareDistribution
net start wuauserv
net start bits

This step can free up 5–25 GB of space.

Step 3: Remove Old System Restore Points

vssadmin delete shadows /all /quiet

This safely deletes old restore points to free disk space.

Step 4: Clean WinSxS (Hidden System Files)

DISM /Online /Cleanup-Image /StartComponentCleanup

This command safely removes outdated Windows components.

Step 5: Full C Drive Scan (Disk Error Check)

chkdsk C: /f /r

Type Y and restart your laptop.
This scan fixes disk errors and bad sectors.

Step 6: Repair Windows System Files

System File Checker

sfc /scannow

Windows Image Repair

DISM /Online /Cleanup-Image /RestoreHealth

These commands repair corrupted Windows files.

Step 7: Laptop Speed Test (CPU, RAM & Disk)

CPU Performance Test

winsat cpu

RAM Speed Test

winsat mem

Disk Speed Test

winsat disk -drive c

Disk Type	Expected Speed
HDD	80–150 MB/s
SATA SSD	400–550 MB/s
NVMe SSD	1500+ MB/s

Step 8: SSD Slot Scan (NVMe / SATA)

Check Installed Drives

wmic diskdrive get model,interfacetype,mediatype,size

Check SSD Slot Type

Get-PhysicalDisk | Format-Table FriendlyName,MediaType,BusType,Size

BusType meanings:
NVMe = M.2 NVMe slot
SATA = SATA SSD/HDD slot

Step 9: Enable & Run SSD TRIM

Check TRIM Status

fsutil behavior query DisableDeleteNotify

Enable TRIM

fsutil behavior set DisableDeleteNotify 0

Manual SSD TRIM

defrag C: /L

TRIM improves SSD performance and lifespan.

Step 10: Schedule Weekly SSD TRIM

schtasks /create /tn "Weekly_SSD_TRIM" /tr "defrag C: /L" /sc weekly /d SUN /st 03:00 /rl highest /f

This runs SSD optimization automatically every week.

Step 11: Final Speed Optimization Tips

Disable Startup Programs

msconfig

Uninstall Unused Software

appwiz.cpl

Avoid uninstalling system components such as Microsoft Visual C++, .NET Framework, and device drivers.

Important Folders You Must NOT Delete

C:\Windows
C:\Program Files
C:\Program Files (x86)
C:\ProgramData
C:\EFI

Final Result

Low disk space fixed
Faster laptop performance
SSD optimized with TRIM
Disk errors repaired
System ready for upgrade

Conclusion

This complete Windows optimization guide helps you clean the C drive, improve laptop speed, scan SSD slots, and maintain SSD health safely without reinstalling Windows.