引用自 Jamster_Man：

Is steam infecting my PC/ Laptop with Malware?
I've recently discovered that when I got a new game recently, after playing, my Mouse will start bugging out and my PC will become hard to control.
Is this a thing thats happening with steam recently?

Not enough information.
Systems can become sluggish especially for graphics when the GPU is at 100%, or there's significant thermal throttling due to an overheating condition. Check that the system can handle what's being asked of it if this is happening while playing.
What the specs are and what game&apps running is information that could help.

引用自 Mad Scientist：

引用自 Jamster_Man：

Is steam infecting my PC/ Laptop with Malware?
I've recently discovered that when I got a new game recently, after playing, my Mouse will start bugging out and my PC will become hard to control.
Is this a thing thats happening with steam recently?

Not enough information.
Systems can become sluggish especially for graphics when the GPU is at 100%, or there's significant thermal throttling due to an overheating condition. Check that the system can handle what's being asked of it if this is happening while playing.
What the specs are and what game&apps running is information that could help.

It's not with my Specs, I had to uninstall my game because I found out my mouse last night was playing up, moving around like crazy and since uninstalling it, I've had 1 small instance it would have acted up by itself

No, PCs require proper maintenance which is something many gamers don't know how to do or don't know they need to. Update your system, clean it, install the latest drivers for everything and update the bios.

引用自 Jamster_Man：

引用自 Mad Scientist：

Not enough information.
Systems can become sluggish especially for graphics when the GPU is at 100%, or there's significant thermal throttling due to an overheating condition. Check that the system can handle what's being asked of it if this is happening while playing.
What the specs are and what game&apps running is information that could help.

It's not with my Specs, I had to uninstall my game because I found out my mouse last night was playing up, moving around like crazy and since uninstalling it, I've had 1 small instance it would have acted up by itself

If the issue was "the game" then you could not have been infected with something trough steam, as that "malware" would persist on your machine even when you uninstall the source of it.

引用自 Jamster_Man：

引用自 Mad Scientist：

Not enough information.
Systems can become sluggish especially for graphics when the GPU is at 100%, or there's significant thermal throttling due to an overheating condition. Check that the system can handle what's being asked of it if this is happening while playing.
What the specs are and what game&apps running is information that could help.

It's not with my Specs, I had to uninstall my game because I found out my mouse last night was playing up, moving around like crazy and since uninstalling it, I've had 1 small instance it would have acted up by itself

So the question comes down to if something conflicted and switched only to integrated graphics, was otherwise in a stuck/not fully crashed condition, or what was running in the background. Generally these things don't just happen without a root cause.

Specs are definitely important, so is knowing the game/app vs the specs to see if there's any reports of unusual activity/driver conflicts etc.