Hello, the problem I'm having seems to consist of many (very annoying) portions.
Firstly, my computer was going into shutdown last night when I finished using it. I came back in because it sounded like it was still on, and it had rebooted itself and tried to begin a repair automatically.
Secondly, I let it continue this, only to come in at 11pm the following day (it was 3AM when I got off) and it was still repairing.
Then, I cancelled it (which it told me I couldn't do, so I rebooted) and went back in and logged in. I started Avast to check for viruses and both scans (quick and full) flashed on and off quickly without scanning, so I figured there must be a virus preventing it from scanning. I scheduled a boot-time scan and rebooted.
When it logged back into Windows, it did not boot-time scan, but instead just moved on and logged in. I checked Avast and it said I was unprotected. I tried to go get Malware Bytes, and it crashed and then BSOD.
I tried to boot up in safe mode and the safe mode startup froze at classpnp.sys, as did safe mode with netowrking (I was going to try a remote access from my laptop to fix it.)
When I try to boot up normally, it freezes on the Windows logo.
When I try to boot from 'last known good config.' it freezes or goes to a black screen.
On all accounts it BSODs after a short time.
The few times I've gotten it to boot up and log in, everything loads up, then it BSODs again or freezes before I can get Maware Bytes up and BSODs.
As far as where I could have gotten a virus (which I suspect this is caused by) is that recently I downloaded and installed the "Listening Singing Teacher" (which will not allow me to uninstall because it says that something was not installed properly.)
As I was working on this post, I got it to boot all the way up and log in. I tried allowing remote access from this laptop and it wouldn't let me get to the network menu to select it. I then tried to open the internet, but it refused. I then tried to do a system restore, but the start menu froze before I could open it. Then BSOD and reboot.
I just tried Safe Mode again and it froze on Classpnp.sys once more.
Firstly, my computer was going into shutdown last night when I finished using it. I came back in because it sounded like it was still on, and it had rebooted itself and tried to begin a repair automatically.
Secondly, I let it continue this, only to come in at 11pm the following day (it was 3AM when I got off) and it was still repairing.
Then, I cancelled it (which it told me I couldn't do, so I rebooted) and went back in and logged in. I started Avast to check for viruses and both scans (quick and full) flashed on and off quickly without scanning, so I figured there must be a virus preventing it from scanning. I scheduled a boot-time scan and rebooted.
When it logged back into Windows, it did not boot-time scan, but instead just moved on and logged in. I checked Avast and it said I was unprotected. I tried to go get Malware Bytes, and it crashed and then BSOD.
I tried to boot up in safe mode and the safe mode startup froze at classpnp.sys, as did safe mode with netowrking (I was going to try a remote access from my laptop to fix it.)
When I try to boot up normally, it freezes on the Windows logo.
When I try to boot from 'last known good config.' it freezes or goes to a black screen.
On all accounts it BSODs after a short time.
The few times I've gotten it to boot up and log in, everything loads up, then it BSODs again or freezes before I can get Maware Bytes up and BSODs.
As far as where I could have gotten a virus (which I suspect this is caused by) is that recently I downloaded and installed the "Listening Singing Teacher" (which will not allow me to uninstall because it says that something was not installed properly.)
As I was working on this post, I got it to boot all the way up and log in. I tried allowing remote access from this laptop and it wouldn't let me get to the network menu to select it. I then tried to open the internet, but it refused. I then tried to do a system restore, but the start menu froze before I could open it. Then BSOD and reboot.
I just tried Safe Mode again and it froze on Classpnp.sys once more.
) did not work (I assume you tried it), take out the existing HDD and replace it with a fresh one. 
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