WCTxxxx.tmp files in C:\Users\username\AppData\Local\Temp


eulenfalter

Active member
Local time
12:42 PM
Posts
19
OS
Windows 11 Pro ARM64 (Apple Silicon M1/Parallels)
Hello,

there are >2GB of WCTxxxx.tmp in C:\Users\username\AppData\Local\Temp ; Win 11 Pro (ARM), up-to-date release version (no beta).
Renaming to .exe reveals they seem to be old OneDrive updates.
They are not being deleted when performing temp cleanup via windows settings.
1. Does everybody have these files, provided you are using OneDrive?
2. Is it correct that this can be considered App mishavior of a MS app - not cleaning up old update exes, and accumating them to the GB level?
3. Is it correct that they can safely be deleted, especially older ones?

Thank you.
 

My Computer

System One

  • OS
    Windows 11 Pro ARM64 (Apple Silicon M1/Parallels)
    Computer type
    Laptop
    Manufacturer/Model
    Apple
    CPU
    M1 Apple Silicon
    Memory
    5 GB VM / 16 GB Host (MacOS)
    Monitor(s) Displays
    13.3" retina
    Hard Drives
    1 TB SSD
    Mouse
    touchpad (internal)
They should be safe to delete. You might want to copy them to another location first, just in case. Once everything is deemed working fine without those files, delete your backup copy. Personally, I would simply whack them.

I had a problem in the original Win 11 release where my logon time would slowly start to take longer and longer, and I finally isolated it to something that happens when I have large numbers of folders / files in %temp%. However, I know that issue is resolved in 22H2 and I believe was also fixed with a Patch Tuesday update for the original release (the slow logon issue that is - I still get huge numbers of files in that folder). As a result of that issue I used to delete the contents of %Temp% about once a week and never ever saw any issues whatsoever. There would always be like 10 files that could not be deleted as they were reported as being in use, so those files I simply left alone.

Currently, I have 28 of the files that you reference but all 28 only add up to 1.34 MB.
 

My Computers

System One System Two

  • OS
    Win11 Pro 23H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-11700K
    Motherboard
    ASUS Prime Z590-A
    Memory
    128GB Crucial Ballistix 3200MHz DRAM
    Graphics Card(s)
    No GPU - CPU graphics only (for now)
    Sound Card
    Realtek (on motherboard)
    Monitor(s) Displays
    HP Envy 32
    Screen Resolution
    2560 x 1440
    Hard Drives
    1 x 1TB NVMe Gen 4 x 4 SSD
    1 x 2TB NVMe Gen 3 x 4 SSD
    2 x 512GB 2.5" SSDs
    2 x 8TB HD
    PSU
    Corsair HX850i
    Case
    Corsair iCue 5000X RGB
    Cooling
    Noctua NH-D15 chromax.black cooler + 10 case fans
    Keyboard
    CODE backlit mechanical keyboard
    Mouse
    Logitech MX Master 3
    Internet Speed
    1Gb Up / 1 Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    Additional options installed:
    WiFi 6E PCIe adapter
    ASUS ThunderboltEX 4 PCIe adapter
  • Operating System
    Win11 Pro 23H2
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 13x Gen 2
    CPU
    Intel i7-1255U
    Memory
    16 GB
    Graphics card(s)
    Intel Iris Xe Graphics
    Sound Card
    Realtek® ALC3306-CG codec
    Monitor(s) Displays
    13.3-inch IPS Display
    Screen Resolution
    WQXGA (2560 x 1600)
    Hard Drives
    2 TB 4 x 4 NVMe SSD
    PSU
    USB-C / Thunderbolt 4 Power / Charging
    Mouse
    Buttonless Glass Precision Touchpad
    Keyboard
    Backlit, spill resistant keyboard
    Internet Speed
    1Gb Up / 1Gb Down
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    WiFi 6e / Bluetooth 5.1 / Facial Recognition / Fingerprint Sensor / ToF (Time of Flight) Human Presence Sensor
Thank you very much for your kindly-written reply.

In my case, there are dozens of files that are all around 50 MB -- all installation files, renamed to tmp. But there are also more wct.... files of smaller sizes (considerably smaller).
 

My Computer

System One

  • OS
    Windows 11 Pro ARM64 (Apple Silicon M1/Parallels)
    Computer type
    Laptop
    Manufacturer/Model
    Apple
    CPU
    M1 Apple Silicon
    Memory
    5 GB VM / 16 GB Host (MacOS)
    Monitor(s) Displays
    13.3" retina
    Hard Drives
    1 TB SSD
    Mouse
    touchpad (internal)

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