Windows 10: my C drive is losing space by the second

my C drive is losing space for no reason. i haven't downloaded anything and i'm sitting here watching it slowly fill up by the second. there was 40GB of space left 10 minutes ago and now there's 38.9GB of space left. i'm literally just sitting here watching it, i've not touched anything or installed anything.i've run windows defender scans on my C drive about an hour ago and there were two viruses which i deleted but i'm still losing space. i'm doing another one in case it somehow missed something. i'm also running a scan with iobit advanced system care i have no idea what i'm supposed to do.

:)

 

C: drive progressively loses space

Hello,

My C: drive is progressively losing space the longer my computer is on. I am currently experiencing the worst example of it so far, which has prompted me to post this support request.

• Three hours ago, I turned my computer on. C: had 32GB of free space.
• Thirty minutes ago, I received a 'low disk space' warning. C: had been reduced to 0 bytes.
• I moved 3.6GB of personal files to an external drive. After checking in 'This PC', however, C: showed just 2.2GB of free space.
• At the time of writing, C: now has 1.3GB of space remaining. This will occasionally drop in increments of 50MB to 100MB. It will also sometimes stabilise for a short time before continuing to drop again.

The only programs I have used in the past three hours are Chrome, Firefox, Foxtel Go (a streaming application), and Media Player Classic. It does not seem to matter which applications I use - if I use any applications at all - for the space to continue disappearing. Malwarebytes has not discovered any threats, either, and nothing appears to be abnormal in Task Manager.

How can I figure out what is going on? Can anyone help, or suggest anything? This is incredibly frustrating and inconveniencing as you can imagine.

Thank you in advance.

Computer: Toshiba Satellite
Processor: Intel Core i7-4700MQ CPU @ 2.40GHz
System type: 64-bit operating system, x64-based processor
Operating system: Windows 10 Pro

 

Unallocated Space to C Drive

Thanks

 

Unallocated Space to C Drive

Hi Travis,

It appears that a disk partition was created but was never assigned its allocation. Assuming there are no files stored in the unallocated partition, perform these steps to combine it with your C: drive:

• In Disk Management, right-click on (C which appears next to the
  Unallocated partition.
  
• Select Extend.

Let us know if you're able to combine the spaces after following the steps above.

Regards.