Desciption

Windows 10 user here. As the title says, somehow overnight my C drive has been populated with 20GB of data overnight. The situation happened recently, and is something new, as it has not happened in the past.

My C Drive has normally around 25GB of free space left, but after going to sleep this space shrank to around 3GB (in fact the system broke down when I woke it up in the morning).

"broke down" means not returning back to Windows Desktop as usual but to become bluescreen anouncing "Your device has met problem, need reboot"(translated into English), and the terminal code was MEMORY_MANAGEMENT

Is this caused by some kind of virus or perhaps some user settings?

Before:

Bluescreen during waking up:

After:

What's interesting is that if I shutdown and reboot, the free space will return to normal once more.

My Effort (or the Details)

I've tried to detect what happened using SpaceSniffer but saw nothing out of the ordinary.

Before:

After:

I've also checked Windows EventViewer, and I remembered that there was no event during the sleep.

new observation：

• I let my pc sleep(click Power->Sleep in) for just a while(around 10 minutes) before waking it up(by pressing keyboard), the situation remained the same(this time the space left around 5GB).
• Directly reboot won't let the free space come back, only shutdown + boot would do.

Maybe it's some system error? (Oh I should check BSOD Error)

Desciption

Windows 10 user here. As the title says, somehow overnight my C drive has been populated with 20GB of data overnight. The situation happened recently, and is something new, as it has not happened in the past.

My C Drive has normally around 25GB of free space left, but after going to sleep this space shrank to around 3GB (in fact the system broke down when I woke it up in the morning).

"broke down" means not returning back to Windows Desktop as usual but to become bluescreen anouncing "Your device has met problem, need reboot"(translated into English), and the terminal code was MEMORY_MANAGEMENT

Is this caused by some kind of virus or perhaps some user settings?

Before:

Bluescreen during waking up:

After:

What's interesting is that if I shutdown and reboot, the free space will return to normal once more.

My Effort (or the Details)

I've tried to detect what happened using SpaceSniffer but saw nothing out of the ordinary.

Before:

After:

I've also checked Windows EventViewer, and I remembered that there was no event during the sleep.

new observation：

• I let my pc sleep(click Power->Sleep in) for just a while(around 10 minutes) before waking it up(by pressing keyboard), the situation remained the same(this time the space left around 5GB).
• Directly reboot won't let the free space come back, only shutdown + boot would do.

Maybe it's some system error? (Oh I should check BSOD Error)

Thank you all very much for help!!! I would try those methods and report them if I'm free (tons of exams and deadlines are coming (´;ω;`)

Windows 10 user here. As the title says, somehow overnight my C drive has been populated with 20GB of data overnight. The situation happened recently, and is something new, as it has not happened in the past.

My C Drive has normally around 25GB of free space left, but after going to sleep this space shrank to around 3GB (in fact the system broke down when I woke it up in the morning).

Is this caused by some kind of virus or perhaps some user settings?

Before:

After:  

What's interesting is that if I shutdown and reboot, the free space will return to normal once more.

I've tried to detect what happened using SpaceSniffer but saw nothing out of the ordinary.

Before:

After:

I've also checked Windows EventViewer, and I remembered that there was no event during the sleep.

Desciption

Windows 10 user here. As the title says, somehow overnight my C drive has been populated with 20GB of data overnight. The situation happened recently, and is something new, as it has not happened in the past.

My C Drive has normally around 25GB of free space left, but after going to sleep this space shrank to around 3GB (in fact the system broke down when I woke it up in the morning).

"broke down" means not returning back to Windows Desktop as usual but to become bluescreen anouncing "Your device has met problem, need reboot"(translated into English), and the terminal code was MEMORY_MANAGEMENT

Is this caused by some kind of virus or perhaps some user settings?

Before:

Bluescreen during waking up:

After: 

What's interesting is that if I shutdown and reboot, the free space will return to normal once more.

My Effort (or the Details)

I've tried to detect what happened using SpaceSniffer but saw nothing out of the ordinary.

Before:

After:

I've also checked Windows EventViewer, and I remembered that there was no event during the sleep.

new observation：

• I let my pc sleep(click Power->Sleep in) for just a while(around 10 minutes) before waking it up(by pressing keyboard), the situation remained the same(this time the space left around 5GB).
• Directly reboot won't let the free space come back, only shutdown + boot would do.

Maybe it's some system error? (Oh I should check BSOD Error)