Windows 10 problems

Hi, I need help with my computer because I have no idea about anything when it comes to tech. My computer was running TF2 and mumble fine for the most part, with perhaps a little lag, but nothing else.

So, I upgraded to windows 10 2 or 3 weeks ago. Ever since, my computer has had a ridiculous amount of problems with TF2, such as:
I have a much lower rate of fps (especially on scout).
I have to reconnect to mumble every 30 minutes or so because it stops working for me.
Occasionally when I launch TF2, there is no audio at all.
Whenever the server changes maps, I have about a 75% chance of crashing/freezing.
The hop command in server doesn't work for me anymore.
Whenever I try to trade in game, the trade window doesn't show up, although I can open up the overlay.
I can't snipe that's my fault
Can't talk in-game anymore (may be a conflict with mumble, idk)

I've tried many solutions, such as:
Disabling VSync.
Verifying the Integrity of Game Cache.
Modifying my screen when TF2 launches and using low graphics.
Uninstalling McAfee.
Disabling the mumble overlay.
Restarting my computer (it generally fixes the no audio problem)

None of these worked. Any suggestions?

 

Discussed with Microline in private PM, he advised me to turn off notifications and set the performance plan to high performance (formerly had that, but I switched it because I thought it might have been causing the lag). Will test tomorrow when I have the time.

Any other advice will be used as well, since I need any kind of help.

 

Laptop
Manufacturer: Dell
Model: Inspiron 5520
Processor: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz 2.50 GHz
Installed memory (RAM): 8.00 GB
System type: 64-bit Operating System, x64-based processor
Pen and Touch: No Pen or Touch Input is available for this display

I updated a bunch of stuff and I have one update left, but it's the update that was added a day ago. My current driver does support Windows 10.

System notifications

 

Is the initial and maximum value the same value? I only see one recommended value for it.

 

Did everything you guys suggested, doesn't seem to have helped

 

Thought about doing that but my parents were the ones who told me to get Windows 10, and I doubt they would uninstall it for me (they have administrator control on my computer).

 

Under sound, video, and game controllers, I uninstalled and reinstalled Conexant SmartAudio HD. I have Intel(R) Display Audio as well, but I don't know if that is also an audio drive.

I now can't join a server without crashing. I looked in the windows logs and this came up:

TF2 crash:
Faulting application name: hl2.exe, version: 0.0.0.0, time stamp: 0x5632ac10
Faulting module name: ntdll.dll, version: 10.0.10240.16430, time stamp: 0x55c599e1
Exception code: 0xc0000374
Fault offset: 0x000d5c0c
Faulting process id: 0x2bd0
Faulting application start time: 0x01d11b224ffc5cf5
Faulting application path: C:\Tim\Tim's_Entertainment\Steam\steamapps\common\Team Fortress 2\hl2.exe
Faulting module path: C:\WINDOWS\SYSTEM32\ntdll.dll
Report Id: aaa36466-6b44-4159-9db7-a5634e8e0278
Faulting package full name:
Faulting package-relative application ID:

as well as the audio crash:
Faulting application name: AUDIODG.EXE, version: 10.0.10240.16384, time stamp: 0x559f3a8d
Faulting module name: CX64AP54.dll, version: 4.80.54.0, time stamp: 0x4f05fa1b
Exception code: 0xc0000005
Fault offset: 0x00000000000f5e4d
Faulting process id: 0x263c
Faulting application start time: 0x01d11b2254b82d65
Faulting application path: C:\WINDOWS\system32\AUDIODG.EXE
Faulting module path: C:\WINDOWS\system32\CX64AP54.dll
Report Id: 9ae86d93-30dc-41aa-ac0e-2e1f4ea693ce
Faulting package full name:
Faulting package-relative application ID:

Help please.

 

I think I saved the audio thing to the wrong folder, I deleted it and restarted my computer, and I can now play again

Other problems may persist.

 

I can join servers from my favorites, but not servers through selecting them or the meramissions. Quickplay works however. I don't get much lag anymore, mainly just mumble and joining server problems now.

I updated my drivers a week ago, but many of these problems have persisted for a month.
Windows hasn't updated recently aside from my drivers.
Steam and TF2 have had updates, but regardless of the updates for the past month, none seem to fix the problem.
Yep, restarted.

1) Will try.
2) Updated my graphics driver 1-2 weeks ago.
3) Yesterday
4) Done multiple times, nothing's wrong apparently.
5) I'd really like not to do this
6) Yeah, if I can't find the solution here I'm going to ask on the steam forums
7) This would have to be a last ditch option, and I'm not at that point yet.